diff --git a/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.cc b/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.cc
index 551bf9a84da..331da2f4a33 100644
--- a/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.cc
+++ b/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.cc
@@ -276,6 +276,9 @@ PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT
 inline constexpr ListItemsResponse::Impl_::Impl_(
     ::_pbi::ConstantInitialized) noexcept
       : items_{},
+        canonical_path_(
+            &::google::protobuf::internal::fixed_address_empty_string,
+            ::_pbi::ConstantInitialized()),
         _cached_size_{0} {}
 
 template <typename>
@@ -339,6 +342,7 @@ const ::uint32_t TableStruct_deephaven_2fproto_2fstorage_2eproto::offsets[] PROT
     ~0u,  // no _split_
     ~0u,  // no sizeof(Split)
     PROTOBUF_FIELD_OFFSET(::io::deephaven::proto::backplane::grpc::ListItemsResponse, _impl_.items_),
+    PROTOBUF_FIELD_OFFSET(::io::deephaven::proto::backplane::grpc::ListItemsResponse, _impl_.canonical_path_),
     PROTOBUF_FIELD_OFFSET(::io::deephaven::proto::backplane::grpc::FetchFileRequest, _impl_._has_bits_),
     PROTOBUF_FIELD_OFFSET(::io::deephaven::proto::backplane::grpc::FetchFileRequest, _internal_metadata_),
     ~0u,  // no _extensions_
@@ -444,16 +448,16 @@ static const ::_pbi::MigrationSchema
         {0, 10, -1, sizeof(::io::deephaven::proto::backplane::grpc::ListItemsRequest)},
         {12, 24, -1, sizeof(::io::deephaven::proto::backplane::grpc::ItemInfo)},
         {28, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::ListItemsResponse)},
-        {37, 47, -1, sizeof(::io::deephaven::proto::backplane::grpc::FetchFileRequest)},
-        {49, 59, -1, sizeof(::io::deephaven::proto::backplane::grpc::FetchFileResponse)},
-        {61, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::SaveFileRequest)},
-        {72, 81, -1, sizeof(::io::deephaven::proto::backplane::grpc::SaveFileResponse)},
-        {82, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::MoveItemRequest)},
-        {93, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::MoveItemResponse)},
-        {101, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::CreateDirectoryRequest)},
-        {110, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::CreateDirectoryResponse)},
-        {118, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::DeleteItemRequest)},
-        {127, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::DeleteItemResponse)},
+        {38, 48, -1, sizeof(::io::deephaven::proto::backplane::grpc::FetchFileRequest)},
+        {50, 60, -1, sizeof(::io::deephaven::proto::backplane::grpc::FetchFileResponse)},
+        {62, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::SaveFileRequest)},
+        {73, 82, -1, sizeof(::io::deephaven::proto::backplane::grpc::SaveFileResponse)},
+        {83, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::MoveItemRequest)},
+        {94, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::MoveItemResponse)},
+        {102, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::CreateDirectoryRequest)},
+        {111, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::CreateDirectoryResponse)},
+        {119, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::DeleteItemRequest)},
+        {128, -1, -1, sizeof(::io::deephaven::proto::backplane::grpc::DeleteItemResponse)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -478,50 +482,50 @@ const char descriptor_table_protodef_deephaven_2fproto_2fstorage_2eproto[] PROTO
     "\tH\000\210\001\001B\016\n\014_filter_glob\"\201\001\n\010ItemInfo\022\014\n\004p"
     "ath\030\001 \001(\t\0229\n\004type\030\002 \001(\0162+.io.deephaven.p"
     "roto.backplane.grpc.ItemType\022\020\n\004size\030\003 \001"
-    "(\022B\0020\001\022\021\n\004etag\030\004 \001(\tH\000\210\001\001B\007\n\005_etag\"O\n\021Li"
+    "(\022B\0020\001\022\021\n\004etag\030\004 \001(\tH\000\210\001\001B\007\n\005_etag\"g\n\021Li"
     "stItemsResponse\022:\n\005items\030\001 \003(\0132+.io.deep"
-    "haven.proto.backplane.grpc.ItemInfo\"<\n\020F"
-    "etchFileRequest\022\014\n\004path\030\001 \001(\t\022\021\n\004etag\030\002 "
-    "\001(\tH\000\210\001\001B\007\n\005_etag\"A\n\021FetchFileResponse\022\020"
-    "\n\010contents\030\001 \001(\014\022\021\n\004etag\030\002 \001(\tH\000\210\001\001B\007\n\005_"
-    "etag\"J\n\017SaveFileRequest\022\027\n\017allow_overwri"
-    "te\030\001 \001(\010\022\014\n\004path\030\002 \001(\t\022\020\n\010contents\030\003 \001(\014"
-    "\".\n\020SaveFileResponse\022\021\n\004etag\030\001 \001(\tH\000\210\001\001B"
-    "\007\n\005_etag\"N\n\017MoveItemRequest\022\020\n\010old_path\030"
-    "\001 \001(\t\022\020\n\010new_path\030\002 \001(\t\022\027\n\017allow_overwri"
-    "te\030\003 \001(\010\"\022\n\020MoveItemResponse\"&\n\026CreateDi"
-    "rectoryRequest\022\014\n\004path\030\001 \001(\t\"\031\n\027CreateDi"
-    "rectoryResponse\"!\n\021DeleteItemRequest\022\014\n\004"
-    "path\030\001 \001(\t\"\024\n\022DeleteItemResponse*0\n\010Item"
-    "Type\022\013\n\007UNKNOWN\020\000\022\r\n\tDIRECTORY\020\001\022\010\n\004FILE"
-    "\020\0022\374\005\n\016StorageService\022x\n\tListItems\0223.io."
-    "deephaven.proto.backplane.grpc.ListItems"
-    "Request\0324.io.deephaven.proto.backplane.g"
-    "rpc.ListItemsResponse\"\000\022x\n\tFetchFile\0223.i"
-    "o.deephaven.proto.backplane.grpc.FetchFi"
-    "leRequest\0324.io.deephaven.proto.backplane"
-    ".grpc.FetchFileResponse\"\000\022u\n\010SaveFile\0222."
-    "io.deephaven.proto.backplane.grpc.SaveFi"
-    "leRequest\0323.io.deephaven.proto.backplane"
-    ".grpc.SaveFileResponse\"\000\022u\n\010MoveItem\0222.i"
-    "o.deephaven.proto.backplane.grpc.MoveIte"
-    "mRequest\0323.io.deephaven.proto.backplane."
-    "grpc.MoveItemResponse\"\000\022\212\001\n\017CreateDirect"
-    "ory\0229.io.deephaven.proto.backplane.grpc."
-    "CreateDirectoryRequest\032:.io.deephaven.pr"
-    "oto.backplane.grpc.CreateDirectoryRespon"
-    "se\"\000\022{\n\nDeleteItem\0224.io.deephaven.proto."
-    "backplane.grpc.DeleteItemRequest\0325.io.de"
-    "ephaven.proto.backplane.grpc.DeleteItemR"
-    "esponse\"\000BCH\001P\001Z=github.com/deephaven/de"
-    "ephaven-core/go/internal/proto/storageb\006"
-    "proto3"
+    "haven.proto.backplane.grpc.ItemInfo\022\026\n\016c"
+    "anonical_path\030\002 \001(\t\"<\n\020FetchFileRequest\022"
+    "\014\n\004path\030\001 \001(\t\022\021\n\004etag\030\002 \001(\tH\000\210\001\001B\007\n\005_eta"
+    "g\"A\n\021FetchFileResponse\022\020\n\010contents\030\001 \001(\014"
+    "\022\021\n\004etag\030\002 \001(\tH\000\210\001\001B\007\n\005_etag\"J\n\017SaveFile"
+    "Request\022\027\n\017allow_overwrite\030\001 \001(\010\022\014\n\004path"
+    "\030\002 \001(\t\022\020\n\010contents\030\003 \001(\014\".\n\020SaveFileResp"
+    "onse\022\021\n\004etag\030\001 \001(\tH\000\210\001\001B\007\n\005_etag\"N\n\017Move"
+    "ItemRequest\022\020\n\010old_path\030\001 \001(\t\022\020\n\010new_pat"
+    "h\030\002 \001(\t\022\027\n\017allow_overwrite\030\003 \001(\010\"\022\n\020Move"
+    "ItemResponse\"&\n\026CreateDirectoryRequest\022\014"
+    "\n\004path\030\001 \001(\t\"\031\n\027CreateDirectoryResponse\""
+    "!\n\021DeleteItemRequest\022\014\n\004path\030\001 \001(\t\"\024\n\022De"
+    "leteItemResponse*0\n\010ItemType\022\013\n\007UNKNOWN\020"
+    "\000\022\r\n\tDIRECTORY\020\001\022\010\n\004FILE\020\0022\374\005\n\016StorageSe"
+    "rvice\022x\n\tListItems\0223.io.deephaven.proto."
+    "backplane.grpc.ListItemsRequest\0324.io.dee"
+    "phaven.proto.backplane.grpc.ListItemsRes"
+    "ponse\"\000\022x\n\tFetchFile\0223.io.deephaven.prot"
+    "o.backplane.grpc.FetchFileRequest\0324.io.d"
+    "eephaven.proto.backplane.grpc.FetchFileR"
+    "esponse\"\000\022u\n\010SaveFile\0222.io.deephaven.pro"
+    "to.backplane.grpc.SaveFileRequest\0323.io.d"
+    "eephaven.proto.backplane.grpc.SaveFileRe"
+    "sponse\"\000\022u\n\010MoveItem\0222.io.deephaven.prot"
+    "o.backplane.grpc.MoveItemRequest\0323.io.de"
+    "ephaven.proto.backplane.grpc.MoveItemRes"
+    "ponse\"\000\022\212\001\n\017CreateDirectory\0229.io.deephav"
+    "en.proto.backplane.grpc.CreateDirectoryR"
+    "equest\032:.io.deephaven.proto.backplane.gr"
+    "pc.CreateDirectoryResponse\"\000\022{\n\nDeleteIt"
+    "em\0224.io.deephaven.proto.backplane.grpc.D"
+    "eleteItemRequest\0325.io.deephaven.proto.ba"
+    "ckplane.grpc.DeleteItemResponse\"\000BCH\001P\001Z"
+    "=github.com/deephaven/deephaven-core/go/"
+    "internal/proto/storageb\006proto3"
 };
 static ::absl::once_flag descriptor_table_deephaven_2fproto_2fstorage_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_deephaven_2fproto_2fstorage_2eproto = {
     false,
     false,
-    1726,
+    1750,
     descriptor_table_protodef_deephaven_2fproto_2fstorage_2eproto,
     "deephaven/proto/storage.proto",
     &descriptor_table_deephaven_2fproto_2fstorage_2eproto_once,
@@ -1114,6 +1118,7 @@ inline PROTOBUF_NDEBUG_INLINE ListItemsResponse::Impl_::Impl_(
     ::google::protobuf::internal::InternalVisibility visibility, ::google::protobuf::Arena* arena,
     const Impl_& from)
       : items_{visibility, arena, from.items_},
+        canonical_path_(arena, from.canonical_path_),
         _cached_size_{0} {}
 
 ListItemsResponse::ListItemsResponse(
@@ -1132,6 +1137,7 @@ inline PROTOBUF_NDEBUG_INLINE ListItemsResponse::Impl_::Impl_(
     ::google::protobuf::internal::InternalVisibility visibility,
     ::google::protobuf::Arena* arena)
       : items_{visibility, arena},
+        canonical_path_(arena),
         _cached_size_{0} {}
 
 inline void ListItemsResponse::SharedCtor(::_pb::Arena* arena) {
@@ -1144,6 +1150,7 @@ ListItemsResponse::~ListItemsResponse() {
 }
 inline void ListItemsResponse::SharedDtor() {
   ABSL_DCHECK(GetArena() == nullptr);
+  _impl_.canonical_path_.Destroy();
   _impl_.~Impl_();
 }
 
@@ -1155,6 +1162,7 @@ PROTOBUF_NOINLINE void ListItemsResponse::Clear() {
   (void) cached_has_bits;
 
   _impl_.items_.Clear();
+  _impl_.canonical_path_.ClearToEmpty();
   _internal_metadata_.Clear<::google::protobuf::UnknownFieldSet>();
 }
 
@@ -1166,20 +1174,23 @@ const char* ListItemsResponse::_InternalParse(
 
 
 PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1
-const ::_pbi::TcParseTable<0, 1, 1, 0, 2> ListItemsResponse::_table_ = {
+const ::_pbi::TcParseTable<1, 2, 1, 74, 2> ListItemsResponse::_table_ = {
   {
     0,  // no _has_bits_
     0, // no _extensions_
-    1, 0,  // max_field_number, fast_idx_mask
+    2, 8,  // max_field_number, fast_idx_mask
     offsetof(decltype(_table_), field_lookup_table),
-    4294967294,  // skipmap
+    4294967292,  // skipmap
     offsetof(decltype(_table_), field_entries),
-    1,  // num_field_entries
+    2,  // num_field_entries
     1,  // num_aux_entries
     offsetof(decltype(_table_), aux_entries),
     &_ListItemsResponse_default_instance_._instance,
     ::_pbi::TcParser::GenericFallback,  // fallback
   }, {{
+    // string canonical_path = 2;
+    {::_pbi::TcParser::FastUS1,
+     {18, 63, 0, PROTOBUF_FIELD_OFFSET(ListItemsResponse, _impl_.canonical_path_)}},
     // repeated .io.deephaven.proto.backplane.grpc.ItemInfo items = 1;
     {::_pbi::TcParser::FastMtR1,
      {10, 63, 0, PROTOBUF_FIELD_OFFSET(ListItemsResponse, _impl_.items_)}},
@@ -1189,9 +1200,15 @@ const ::_pbi::TcParseTable<0, 1, 1, 0, 2> ListItemsResponse::_table_ = {
     // repeated .io.deephaven.proto.backplane.grpc.ItemInfo items = 1;
     {PROTOBUF_FIELD_OFFSET(ListItemsResponse, _impl_.items_), 0, 0,
     (0 | ::_fl::kFcRepeated | ::_fl::kMessage | ::_fl::kTvTable)},
+    // string canonical_path = 2;
+    {PROTOBUF_FIELD_OFFSET(ListItemsResponse, _impl_.canonical_path_), 0, 0,
+    (0 | ::_fl::kFcSingular | ::_fl::kUtf8String | ::_fl::kRepAString)},
   }}, {{
     {::_pbi::TcParser::GetTable<::io::deephaven::proto::backplane::grpc::ItemInfo>()},
   }}, {{
+    "\63\0\16\0\0\0\0\0"
+    "io.deephaven.proto.backplane.grpc.ListItemsResponse"
+    "canonical_path"
   }},
 };
 
@@ -1210,6 +1227,14 @@ ::uint8_t* ListItemsResponse::_InternalSerialize(
         InternalWriteMessage(1, repfield, repfield.GetCachedSize(), target, stream);
   }
 
+  // string canonical_path = 2;
+  if (!this->_internal_canonical_path().empty()) {
+    const std::string& _s = this->_internal_canonical_path();
+    ::google::protobuf::internal::WireFormatLite::VerifyUtf8String(
+        _s.data(), static_cast<int>(_s.length()), ::google::protobuf::internal::WireFormatLite::SERIALIZE, "io.deephaven.proto.backplane.grpc.ListItemsResponse.canonical_path");
+    target = stream->WriteStringMaybeAliased(2, _s, target);
+  }
+
   if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
     target =
         ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(
@@ -1233,6 +1258,12 @@ ::size_t ListItemsResponse::ByteSizeLong() const {
     total_size +=
       ::google::protobuf::internal::WireFormatLite::MessageSize(msg);
   }
+  // string canonical_path = 2;
+  if (!this->_internal_canonical_path().empty()) {
+    total_size += 1 + ::google::protobuf::internal::WireFormatLite::StringSize(
+                                    this->_internal_canonical_path());
+  }
+
   return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
 }
 
@@ -1254,6 +1285,9 @@ void ListItemsResponse::MergeImpl(::google::protobuf::Message& to_msg, const ::g
 
   _this->_internal_mutable_items()->MergeFrom(
       from._internal_items());
+  if (!from._internal_canonical_path().empty()) {
+    _this->_internal_set_canonical_path(from._internal_canonical_path());
+  }
   _this->_internal_metadata_.MergeFrom<::google::protobuf::UnknownFieldSet>(from._internal_metadata_);
 }
 
@@ -1273,8 +1307,11 @@ ::_pbi::CachedSize* ListItemsResponse::AccessCachedSize() const {
 }
 void ListItemsResponse::InternalSwap(ListItemsResponse* PROTOBUF_RESTRICT other) {
   using std::swap;
+  auto* arena = GetArena();
+  ABSL_DCHECK_EQ(arena, other->GetArena());
   _internal_metadata_.InternalSwap(&other->_internal_metadata_);
   _impl_.items_.InternalSwap(&other->_impl_.items_);
+  ::_pbi::ArenaStringPtr::InternalSwap(&_impl_.canonical_path_, &other->_impl_.canonical_path_, arena);
 }
 
 ::google::protobuf::Metadata ListItemsResponse::GetMetadata() const {
diff --git a/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.h b/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.h
index 19c5b583bce..9d2a9b9d6a7 100644
--- a/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.h
+++ b/cpp-client/deephaven/dhclient/proto/deephaven/proto/storage.pb.h
@@ -2492,6 +2492,7 @@ class ListItemsResponse final :
 
   enum : int {
     kItemsFieldNumber = 1,
+    kCanonicalPathFieldNumber = 2,
   };
   // repeated .io.deephaven.proto.backplane.grpc.ItemInfo items = 1;
   int items_size() const;
@@ -2511,14 +2512,30 @@ class ListItemsResponse final :
   ::io::deephaven::proto::backplane::grpc::ItemInfo* add_items();
   const ::google::protobuf::RepeatedPtrField< ::io::deephaven::proto::backplane::grpc::ItemInfo >&
       items() const;
+  // string canonical_path = 2;
+  void clear_canonical_path() ;
+  const std::string& canonical_path() const;
+  template <typename Arg_ = const std::string&, typename... Args_>
+  void set_canonical_path(Arg_&& arg, Args_... args);
+  std::string* mutable_canonical_path();
+  PROTOBUF_NODISCARD std::string* release_canonical_path();
+  void set_allocated_canonical_path(std::string* value);
+
+  private:
+  const std::string& _internal_canonical_path() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_canonical_path(
+      const std::string& value);
+  std::string* _internal_mutable_canonical_path();
+
+  public:
   // @@protoc_insertion_point(class_scope:io.deephaven.proto.backplane.grpc.ListItemsResponse)
  private:
   class _Internal;
 
   friend class ::google::protobuf::internal::TcParser;
   static const ::google::protobuf::internal::TcParseTable<
-      0, 1, 1,
-      0, 2>
+      1, 2, 1,
+      74, 2>
       _table_;
   friend class ::google::protobuf::MessageLite;
   friend class ::google::protobuf::Arena;
@@ -2535,6 +2552,7 @@ class ListItemsResponse final :
         inline explicit Impl_(::google::protobuf::internal::InternalVisibility visibility,
                               ::google::protobuf::Arena* arena, const Impl_& from);
     ::google::protobuf::RepeatedPtrField< ::io::deephaven::proto::backplane::grpc::ItemInfo > items_;
+    ::google::protobuf::internal::ArenaStringPtr canonical_path_;
     mutable ::google::protobuf::internal::CachedSize _cached_size_;
     PROTOBUF_TSAN_DECLARE_MEMBER
   };
@@ -2909,6 +2927,59 @@ ListItemsResponse::_internal_mutable_items() {
   return &_impl_.items_;
 }
 
+// string canonical_path = 2;
+inline void ListItemsResponse::clear_canonical_path() {
+  PROTOBUF_TSAN_WRITE(&_impl_._tsan_detect_race);
+  _impl_.canonical_path_.ClearToEmpty();
+}
+inline const std::string& ListItemsResponse::canonical_path() const
+    ABSL_ATTRIBUTE_LIFETIME_BOUND {
+  // @@protoc_insertion_point(field_get:io.deephaven.proto.backplane.grpc.ListItemsResponse.canonical_path)
+  return _internal_canonical_path();
+}
+template <typename Arg_, typename... Args_>
+inline PROTOBUF_ALWAYS_INLINE void ListItemsResponse::set_canonical_path(Arg_&& arg,
+                                                     Args_... args) {
+  PROTOBUF_TSAN_WRITE(&_impl_._tsan_detect_race);
+  ;
+  _impl_.canonical_path_.Set(static_cast<Arg_&&>(arg), args..., GetArena());
+  // @@protoc_insertion_point(field_set:io.deephaven.proto.backplane.grpc.ListItemsResponse.canonical_path)
+}
+inline std::string* ListItemsResponse::mutable_canonical_path() ABSL_ATTRIBUTE_LIFETIME_BOUND {
+  std::string* _s = _internal_mutable_canonical_path();
+  // @@protoc_insertion_point(field_mutable:io.deephaven.proto.backplane.grpc.ListItemsResponse.canonical_path)
+  return _s;
+}
+inline const std::string& ListItemsResponse::_internal_canonical_path() const {
+  PROTOBUF_TSAN_READ(&_impl_._tsan_detect_race);
+  return _impl_.canonical_path_.Get();
+}
+inline void ListItemsResponse::_internal_set_canonical_path(const std::string& value) {
+  PROTOBUF_TSAN_WRITE(&_impl_._tsan_detect_race);
+  ;
+  _impl_.canonical_path_.Set(value, GetArena());
+}
+inline std::string* ListItemsResponse::_internal_mutable_canonical_path() {
+  PROTOBUF_TSAN_WRITE(&_impl_._tsan_detect_race);
+  ;
+  return _impl_.canonical_path_.Mutable( GetArena());
+}
+inline std::string* ListItemsResponse::release_canonical_path() {
+  PROTOBUF_TSAN_WRITE(&_impl_._tsan_detect_race);
+  // @@protoc_insertion_point(field_release:io.deephaven.proto.backplane.grpc.ListItemsResponse.canonical_path)
+  return _impl_.canonical_path_.Release();
+}
+inline void ListItemsResponse::set_allocated_canonical_path(std::string* value) {
+  PROTOBUF_TSAN_WRITE(&_impl_._tsan_detect_race);
+  _impl_.canonical_path_.SetAllocated(value, GetArena());
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+        if (_impl_.canonical_path_.IsDefault()) {
+          _impl_.canonical_path_.Set("", GetArena());
+        }
+  #endif  // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:io.deephaven.proto.backplane.grpc.ListItemsResponse.canonical_path)
+}
+
 // -------------------------------------------------------------------
 
 // FetchFileRequest
diff --git a/go/internal/proto/storage/storage.pb.go b/go/internal/proto/storage/storage.pb.go
index fbaab95d99a..7744648cb62 100644
--- a/go/internal/proto/storage/storage.pb.go
+++ b/go/internal/proto/storage/storage.pb.go
@@ -214,6 +214,9 @@ type ListItemsResponse struct {
 
 	// List of items found in the specified directory.
 	Items []*ItemInfo `protobuf:"bytes,1,rep,name=items,proto3" json:"items,omitempty"`
+	// The canonical path of the listed directory. This is useful to recognize the basename
+	// of the items in a cross-platform way.
+	CanonicalPath string `protobuf:"bytes,2,opt,name=canonical_path,json=canonicalPath,proto3" json:"canonical_path,omitempty"`
 }
 
 func (x *ListItemsResponse) Reset() {
@@ -255,6 +258,13 @@ func (x *ListItemsResponse) GetItems() []*ItemInfo {
 	return nil
 }
 
+func (x *ListItemsResponse) GetCanonicalPath() string {
+	if x != nil {
+		return x.CanonicalPath
+	}
+	return ""
+}
+
 type FetchFileRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -785,105 +795,108 @@ var file_deephaven_proto_storage_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/props/configs/src/main/resources/dh-defaults.prop b/props/configs/src/main/resources/dh-defaults.prop
index be2dcba5eb9..3b97d130368 100644
--- a/props/configs/src/main/resources/dh-defaults.prop
+++ b/props/configs/src/main/resources/dh-defaults.prop
@@ -50,12 +50,15 @@ http.session.durationMs=300000
 AuthHandlers=io.deephaven.authentication.psk.PskAuthenticationHandler
 authentication.anonymous.warn=true
 
+web.storage.layout.directory=/layouts
+web.storage.notebook.directory=/notebooks
+
 # List of configuration properties to provide to unauthenticated clients, so that they can decide how best to prove their
 # identity to the server.
 authentication.client.configuration.list=AuthHandlers
 
 # List of configuration properties to provide to authenticated clients, so they can interact with the server.
-client.configuration.list=java.version,deephaven.version,barrage.version,http.session.durationMs
+client.configuration.list=java.version,deephaven.version,barrage.version,http.session.durationMs,file.separator,web.storage.layout.directory,web.storage.notebook.directory
 # Version list to add to the configuration property list. Each `=`-delimited pair denotes a short name for a versioned
 # jar, and a class that is found in that jar. Any such keys will be made available to the client.configuration.list
 # as <key>.version.
diff --git a/props/test-configs/src/main/resources/dh-tests.prop b/props/test-configs/src/main/resources/dh-tests.prop
index baff6680273..b8aa3bec295 100644
--- a/props/test-configs/src/main/resources/dh-tests.prop
+++ b/props/test-configs/src/main/resources/dh-tests.prop
@@ -94,6 +94,9 @@ BarrageMessageProducer.minSnapshotCellCount=50
 BarrageMessageProducer.maxSnapshotCellCount=50
 BarrageStreamGenerator.batchSize=4
 
+web.storage.layout.directory=/layouts
+web.storage.notebook.directory=/notebooks
+
 http.session.durationMs=300000
 AuthHandlers=io.deephaven.auth.AnonymousAuthenticationHandler
 authentication.client.configuration.list=
diff --git a/proto/proto-backplane-grpc/src/main/proto/deephaven/proto/storage.proto b/proto/proto-backplane-grpc/src/main/proto/deephaven/proto/storage.proto
index 10b39633aa5..9bdf28af4ae 100644
--- a/proto/proto-backplane-grpc/src/main/proto/deephaven/proto/storage.proto
+++ b/proto/proto-backplane-grpc/src/main/proto/deephaven/proto/storage.proto
@@ -62,6 +62,10 @@ message ItemInfo {
 message ListItemsResponse {
   // List of items found in the specified directory.
   repeated ItemInfo items = 1;
+
+  // The canonical path of the listed directory. This is useful to recognize the basename
+  // of the items in a cross-platform way.
+  string canonical_path = 2;
 }
 
 message FetchFileRequest {
diff --git a/py/client/pydeephaven/proto/storage_pb2.py b/py/client/pydeephaven/proto/storage_pb2.py
index 140664b4249..279758a8f9b 100644
--- a/py/client/pydeephaven/proto/storage_pb2.py
+++ b/py/client/pydeephaven/proto/storage_pb2.py
@@ -14,7 +14,7 @@
 
 
 
-DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\x1d\x64\x65\x65phaven/proto/storage.proto\x12!io.deephaven.proto.backplane.grpc\"J\n\x10ListItemsRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\x12\x18\n\x0b\x66ilter_glob\x18\x04 \x01(\tH\x00\x88\x01\x01\x42\x0e\n\x0c_filter_glob\"\x81\x01\n\x08ItemInfo\x12\x0c\n\x04path\x18\x01 \x01(\t\x12\x39\n\x04type\x18\x02 \x01(\x0e\x32+.io.deephaven.proto.backplane.grpc.ItemType\x12\x10\n\x04size\x18\x03 \x01(\x12\x42\x02\x30\x01\x12\x11\n\x04\x65tag\x18\x04 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"O\n\x11ListItemsResponse\x12:\n\x05items\x18\x01 \x03(\x0b\x32+.io.deephaven.proto.backplane.grpc.ItemInfo\"<\n\x10\x46\x65tchFileRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\x12\x11\n\x04\x65tag\x18\x02 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"A\n\x11\x46\x65tchFileResponse\x12\x10\n\x08\x63ontents\x18\x01 \x01(\x0c\x12\x11\n\x04\x65tag\x18\x02 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"J\n\x0fSaveFileRequest\x12\x17\n\x0f\x61llow_overwrite\x18\x01 \x01(\x08\x12\x0c\n\x04path\x18\x02 \x01(\t\x12\x10\n\x08\x63ontents\x18\x03 \x01(\x0c\".\n\x10SaveFileResponse\x12\x11\n\x04\x65tag\x18\x01 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"N\n\x0fMoveItemRequest\x12\x10\n\x08old_path\x18\x01 \x01(\t\x12\x10\n\x08new_path\x18\x02 \x01(\t\x12\x17\n\x0f\x61llow_overwrite\x18\x03 \x01(\x08\"\x12\n\x10MoveItemResponse\"&\n\x16\x43reateDirectoryRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\"\x19\n\x17\x43reateDirectoryResponse\"!\n\x11\x44\x65leteItemRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\"\x14\n\x12\x44\x65leteItemResponse*0\n\x08ItemType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\r\n\tDIRECTORY\x10\x01\x12\x08\n\x04\x46ILE\x10\x02\x32\xfc\x05\n\x0eStorageService\x12x\n\tListItems\x12\x33.io.deephaven.proto.backplane.grpc.ListItemsRequest\x1a\x34.io.deephaven.proto.backplane.grpc.ListItemsResponse\"\x00\x12x\n\tFetchFile\x12\x33.io.deephaven.proto.backplane.grpc.FetchFileRequest\x1a\x34.io.deephaven.proto.backplane.grpc.FetchFileResponse\"\x00\x12u\n\x08SaveFile\x12\x32.io.deephaven.proto.backplane.grpc.SaveFileRequest\x1a\x33.io.deephaven.proto.backplane.grpc.SaveFileResponse\"\x00\x12u\n\x08MoveItem\x12\x32.io.deephaven.proto.backplane.grpc.MoveItemRequest\x1a\x33.io.deephaven.proto.backplane.grpc.MoveItemResponse\"\x00\x12\x8a\x01\n\x0f\x43reateDirectory\x12\x39.io.deephaven.proto.backplane.grpc.CreateDirectoryRequest\x1a:.io.deephaven.proto.backplane.grpc.CreateDirectoryResponse\"\x00\x12{\n\nDeleteItem\x12\x34.io.deephaven.proto.backplane.grpc.DeleteItemRequest\x1a\x35.io.deephaven.proto.backplane.grpc.DeleteItemResponse\"\x00\x42\x43H\x01P\x01Z=github.com/deephaven/deephaven-core/go/internal/proto/storageb\x06proto3')
+DESCRIPTOR = _descriptor_pool.Default().AddSerializedFile(b'\n\x1d\x64\x65\x65phaven/proto/storage.proto\x12!io.deephaven.proto.backplane.grpc\"J\n\x10ListItemsRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\x12\x18\n\x0b\x66ilter_glob\x18\x04 \x01(\tH\x00\x88\x01\x01\x42\x0e\n\x0c_filter_glob\"\x81\x01\n\x08ItemInfo\x12\x0c\n\x04path\x18\x01 \x01(\t\x12\x39\n\x04type\x18\x02 \x01(\x0e\x32+.io.deephaven.proto.backplane.grpc.ItemType\x12\x10\n\x04size\x18\x03 \x01(\x12\x42\x02\x30\x01\x12\x11\n\x04\x65tag\x18\x04 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"g\n\x11ListItemsResponse\x12:\n\x05items\x18\x01 \x03(\x0b\x32+.io.deephaven.proto.backplane.grpc.ItemInfo\x12\x16\n\x0e\x63\x61nonical_path\x18\x02 \x01(\t\"<\n\x10\x46\x65tchFileRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\x12\x11\n\x04\x65tag\x18\x02 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"A\n\x11\x46\x65tchFileResponse\x12\x10\n\x08\x63ontents\x18\x01 \x01(\x0c\x12\x11\n\x04\x65tag\x18\x02 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"J\n\x0fSaveFileRequest\x12\x17\n\x0f\x61llow_overwrite\x18\x01 \x01(\x08\x12\x0c\n\x04path\x18\x02 \x01(\t\x12\x10\n\x08\x63ontents\x18\x03 \x01(\x0c\".\n\x10SaveFileResponse\x12\x11\n\x04\x65tag\x18\x01 \x01(\tH\x00\x88\x01\x01\x42\x07\n\x05_etag\"N\n\x0fMoveItemRequest\x12\x10\n\x08old_path\x18\x01 \x01(\t\x12\x10\n\x08new_path\x18\x02 \x01(\t\x12\x17\n\x0f\x61llow_overwrite\x18\x03 \x01(\x08\"\x12\n\x10MoveItemResponse\"&\n\x16\x43reateDirectoryRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\"\x19\n\x17\x43reateDirectoryResponse\"!\n\x11\x44\x65leteItemRequest\x12\x0c\n\x04path\x18\x01 \x01(\t\"\x14\n\x12\x44\x65leteItemResponse*0\n\x08ItemType\x12\x0b\n\x07UNKNOWN\x10\x00\x12\r\n\tDIRECTORY\x10\x01\x12\x08\n\x04\x46ILE\x10\x02\x32\xfc\x05\n\x0eStorageService\x12x\n\tListItems\x12\x33.io.deephaven.proto.backplane.grpc.ListItemsRequest\x1a\x34.io.deephaven.proto.backplane.grpc.ListItemsResponse\"\x00\x12x\n\tFetchFile\x12\x33.io.deephaven.proto.backplane.grpc.FetchFileRequest\x1a\x34.io.deephaven.proto.backplane.grpc.FetchFileResponse\"\x00\x12u\n\x08SaveFile\x12\x32.io.deephaven.proto.backplane.grpc.SaveFileRequest\x1a\x33.io.deephaven.proto.backplane.grpc.SaveFileResponse\"\x00\x12u\n\x08MoveItem\x12\x32.io.deephaven.proto.backplane.grpc.MoveItemRequest\x1a\x33.io.deephaven.proto.backplane.grpc.MoveItemResponse\"\x00\x12\x8a\x01\n\x0f\x43reateDirectory\x12\x39.io.deephaven.proto.backplane.grpc.CreateDirectoryRequest\x1a:.io.deephaven.proto.backplane.grpc.CreateDirectoryResponse\"\x00\x12{\n\nDeleteItem\x12\x34.io.deephaven.proto.backplane.grpc.DeleteItemRequest\x1a\x35.io.deephaven.proto.backplane.grpc.DeleteItemResponse\"\x00\x42\x43H\x01P\x01Z=github.com/deephaven/deephaven-core/go/internal/proto/storageb\x06proto3')
 
 _globals = globals()
 _builder.BuildMessageAndEnumDescriptors(DESCRIPTOR, _globals)
@@ -24,34 +24,34 @@
   _globals['DESCRIPTOR']._serialized_options = b'H\001P\001Z=github.com/deephaven/deephaven-core/go/internal/proto/storage'
   _globals['_ITEMINFO'].fields_by_name['size']._loaded_options = None
   _globals['_ITEMINFO'].fields_by_name['size']._serialized_options = b'0\001'
-  _globals['_ITEMTYPE']._serialized_start=834
-  _globals['_ITEMTYPE']._serialized_end=882
+  _globals['_ITEMTYPE']._serialized_start=858
+  _globals['_ITEMTYPE']._serialized_end=906
   _globals['_LISTITEMSREQUEST']._serialized_start=68
   _globals['_LISTITEMSREQUEST']._serialized_end=142
   _globals['_ITEMINFO']._serialized_start=145
   _globals['_ITEMINFO']._serialized_end=274
   _globals['_LISTITEMSRESPONSE']._serialized_start=276
-  _globals['_LISTITEMSRESPONSE']._serialized_end=355
-  _globals['_FETCHFILEREQUEST']._serialized_start=357
-  _globals['_FETCHFILEREQUEST']._serialized_end=417
-  _globals['_FETCHFILERESPONSE']._serialized_start=419
-  _globals['_FETCHFILERESPONSE']._serialized_end=484
-  _globals['_SAVEFILEREQUEST']._serialized_start=486
-  _globals['_SAVEFILEREQUEST']._serialized_end=560
-  _globals['_SAVEFILERESPONSE']._serialized_start=562
-  _globals['_SAVEFILERESPONSE']._serialized_end=608
-  _globals['_MOVEITEMREQUEST']._serialized_start=610
-  _globals['_MOVEITEMREQUEST']._serialized_end=688
-  _globals['_MOVEITEMRESPONSE']._serialized_start=690
-  _globals['_MOVEITEMRESPONSE']._serialized_end=708
-  _globals['_CREATEDIRECTORYREQUEST']._serialized_start=710
-  _globals['_CREATEDIRECTORYREQUEST']._serialized_end=748
-  _globals['_CREATEDIRECTORYRESPONSE']._serialized_start=750
-  _globals['_CREATEDIRECTORYRESPONSE']._serialized_end=775
-  _globals['_DELETEITEMREQUEST']._serialized_start=777
-  _globals['_DELETEITEMREQUEST']._serialized_end=810
-  _globals['_DELETEITEMRESPONSE']._serialized_start=812
-  _globals['_DELETEITEMRESPONSE']._serialized_end=832
-  _globals['_STORAGESERVICE']._serialized_start=885
-  _globals['_STORAGESERVICE']._serialized_end=1649
+  _globals['_LISTITEMSRESPONSE']._serialized_end=379
+  _globals['_FETCHFILEREQUEST']._serialized_start=381
+  _globals['_FETCHFILEREQUEST']._serialized_end=441
+  _globals['_FETCHFILERESPONSE']._serialized_start=443
+  _globals['_FETCHFILERESPONSE']._serialized_end=508
+  _globals['_SAVEFILEREQUEST']._serialized_start=510
+  _globals['_SAVEFILEREQUEST']._serialized_end=584
+  _globals['_SAVEFILERESPONSE']._serialized_start=586
+  _globals['_SAVEFILERESPONSE']._serialized_end=632
+  _globals['_MOVEITEMREQUEST']._serialized_start=634
+  _globals['_MOVEITEMREQUEST']._serialized_end=712
+  _globals['_MOVEITEMRESPONSE']._serialized_start=714
+  _globals['_MOVEITEMRESPONSE']._serialized_end=732
+  _globals['_CREATEDIRECTORYREQUEST']._serialized_start=734
+  _globals['_CREATEDIRECTORYREQUEST']._serialized_end=772
+  _globals['_CREATEDIRECTORYRESPONSE']._serialized_start=774
+  _globals['_CREATEDIRECTORYRESPONSE']._serialized_end=799
+  _globals['_DELETEITEMREQUEST']._serialized_start=801
+  _globals['_DELETEITEMREQUEST']._serialized_end=834
+  _globals['_DELETEITEMRESPONSE']._serialized_start=836
+  _globals['_DELETEITEMRESPONSE']._serialized_end=856
+  _globals['_STORAGESERVICE']._serialized_start=909
+  _globals['_STORAGESERVICE']._serialized_end=1673
 # @@protoc_insertion_point(module_scope)
diff --git a/server/src/main/java/io/deephaven/server/notebook/FilesystemStorageServiceGrpcImpl.java b/server/src/main/java/io/deephaven/server/notebook/FilesystemStorageServiceGrpcImpl.java
index b9c7b79dd93..c8dacf941d8 100644
--- a/server/src/main/java/io/deephaven/server/notebook/FilesystemStorageServiceGrpcImpl.java
+++ b/server/src/main/java/io/deephaven/server/notebook/FilesystemStorageServiceGrpcImpl.java
@@ -35,6 +35,7 @@
 
 import javax.inject.Inject;
 import javax.inject.Singleton;
+import java.io.File;
 import java.io.IOException;
 import java.io.UncheckedIOException;
 import java.nio.file.DirectoryNotEmptyException;
@@ -70,9 +71,9 @@ public class FilesystemStorageServiceGrpcImpl extends StorageServiceGrpc.Storage
             DataDir.get().resolve("storage").toString());
 
     private static final String WEB_LAYOUT_DIRECTORY =
-            Configuration.getInstance().getStringWithDefault("web.storage.layout.directory", "/layouts");
+            Configuration.getInstance().getProperty("web.storage.layout.directory");
     private static final String WEB_NOTEBOOK_DIRECTORY =
-            Configuration.getInstance().getStringWithDefault("web.storage.notebook.directory", "/notebooks");
+            Configuration.getInstance().getProperty("web.storage.notebook.directory");
     private static final String[] PRE_CREATE_PATHS = Configuration.getInstance()
             .getStringArrayFromPropertyWithDefault("storage.path.defaults", new String[] {
                     WEB_LAYOUT_DIRECTORY,
@@ -86,6 +87,12 @@ public class FilesystemStorageServiceGrpcImpl extends StorageServiceGrpc.Storage
      */
     private static final HashFunction HASH_FUNCTION = Hashing.murmur3_128(0);
 
+    /**
+     * Presently, the Web IDE requires that all paths start with "/". When this is no longer true, remove this constant.
+     */
+    @Deprecated
+    private static final String REQUIRED_PATH_PREFIX = "/";
+
     private final Path root = Paths.get(STORAGE_PATH).normalize();
     private final SessionService sessionService;
     private final SessionService.ErrorTransformer errorTransformer;
@@ -107,11 +114,12 @@ public FilesystemStorageServiceGrpcImpl(
     }
 
     private Path resolveOrThrow(String incomingPath) {
-        if (incomingPath.startsWith("/")) {
-            Path resolved = root.resolve(incomingPath.substring(1)).normalize();
-            if (resolved.startsWith(root)) {
-                return resolved;
-            }
+        if (incomingPath.startsWith(File.separator)) {
+            incomingPath = incomingPath.substring(1);
+        }
+        Path resolved = root.resolve(incomingPath).normalize();
+        if (resolved.startsWith(root)) {
+            return resolved;
         }
         throw Exceptions.statusRuntimeException(Code.INVALID_ARGUMENT, "Invalid path: " + incomingPath);
     }
@@ -132,6 +140,7 @@ public void listItems(
         PathMatcher matcher =
                 request.hasFilterGlob() ? createPathFilter(request.getFilterGlob()) : ignore -> true;
         Path dir = resolveOrThrow(request.getPath());
+        builder.setCanonicalPath(REQUIRED_PATH_PREFIX + root.relativize(dir));
         try (Stream<Path> list = Files.list(dir)) {
             for (Path p : (Iterable<Path>) list::iterator) {
                 if (!matcher.matches(dir.relativize(p))) {
@@ -140,7 +149,7 @@ public void listItems(
                 BasicFileAttributes attrs = Files.readAttributes(p, BasicFileAttributes.class);
                 boolean isDirectory = attrs.isDirectory();
                 ItemInfo.Builder info = ItemInfo.newBuilder()
-                        .setPath("/" + root.relativize(p));
+                        .setPath(REQUIRED_PATH_PREFIX + root.relativize(p));
                 if (isDirectory) {
                     info.setType(ItemType.DIRECTORY);
                 } else {
@@ -163,7 +172,7 @@ private static PathMatcher createPathFilter(String filterGlob) {
         if (filterGlob.contains("**")) {
             throw Exceptions.statusRuntimeException(Code.INVALID_ARGUMENT, "Bad glob, only single `*`s are supported");
         }
-        if (filterGlob.contains("/")) {
+        if (filterGlob.contains(File.separator)) {
             throw Exceptions.statusRuntimeException(Code.INVALID_ARGUMENT,
                     "Bad glob, only the same directory can be checked");
         }
diff --git a/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsItemDetails.java b/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsItemDetails.java
index 3d45dc0fe7e..dcc26bac3a8 100644
--- a/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsItemDetails.java
+++ b/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsItemDetails.java
@@ -7,6 +7,7 @@
 import io.deephaven.javascript.proto.dhinternal.io.deephaven.proto.Storage_pb;
 import io.deephaven.javascript.proto.dhinternal.io.deephaven.proto.storage_pb.ItemInfo;
 import jsinterop.annotations.JsIgnore;
+import jsinterop.annotations.JsMethod;
 import jsinterop.annotations.JsProperty;
 import jsinterop.annotations.JsType;
 
@@ -15,13 +16,15 @@
  */
 @JsType(namespace = "dh.storage", name = "ItemDetails")
 public class JsItemDetails {
+    private final String parentPath;
     private final String path;
     private final int type;
     private final String size;
     private final String etag;
 
     @JsIgnore
-    public JsItemDetails(String path, int kind, String size, String etag) {
+    public JsItemDetails(String parentPath, String path, int kind, String size, String etag) {
+        this.parentPath = parentPath;
         this.path = path;
         this.type = kind;
         this.size = size;
@@ -29,8 +32,8 @@ public JsItemDetails(String path, int kind, String size, String etag) {
     }
 
     @JsIgnore
-    public static JsItemDetails fromProto(ItemInfo item) {
-        return new JsItemDetails(item.getPath(), item.getType(), item.getSize(), item.getEtag());
+    public static JsItemDetails fromProto(String parentPath, ItemInfo item) {
+        return new JsItemDetails(parentPath, item.getPath(), item.getType(), item.getSize(), item.getEtag());
     }
 
     @JsProperty
@@ -40,12 +43,16 @@ public String getFilename() {
 
     @JsProperty
     public String getBasename() {
-        return path.substring(path.lastIndexOf('/') + 1);
+        // TODO (deephaven-core#5068) remove extra check
+        if (parentPath.equals("/")) {
+            return path.substring(1);
+        }
+        return path.substring(parentPath.length() + 1);
     }
 
     @JsProperty
     public String getDirname() {
-        return path.substring(0, path.lastIndexOf('/'));
+        return parentPath;
     }
 
     @JsProperty
@@ -63,4 +70,10 @@ public double getSize() {
     public String getEtag() {
         return etag;
     }
+
+    @JsMethod
+    @Override
+    public String toString() {
+        return getBasename();
+    }
 }
diff --git a/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsStorageService.java b/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsStorageService.java
index f83c5731910..0ec927df9ee 100644
--- a/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsStorageService.java
+++ b/web/client-api/src/main/java/io/deephaven/web/client/api/storage/JsStorageService.java
@@ -64,7 +64,8 @@ public Promise<JsArray<JsItemDetails>> listItems(String path, @JsOptional String
         req.setFilterGlob(glob);
         return Callbacks.<ListItemsResponse, Object>grpcUnaryPromise(c -> client().listItems(req, metadata(), c::apply))
                 .then(response -> Promise
-                        .resolve(response.getItemsList().map((item, i, arr) -> JsItemDetails.fromProto(item))));
+                        .resolve(response.getItemsList()
+                                .map((item, i, arr) -> JsItemDetails.fromProto(response.getCanonicalPath(), item))));
     }
 
     /**
diff --git a/web/client-api/src/test/java/io/deephaven/web/ClientIntegrationTestSuite.java b/web/client-api/src/test/java/io/deephaven/web/ClientIntegrationTestSuite.java
index 635cbaaee7e..077edddb63a 100644
--- a/web/client-api/src/test/java/io/deephaven/web/ClientIntegrationTestSuite.java
+++ b/web/client-api/src/test/java/io/deephaven/web/ClientIntegrationTestSuite.java
@@ -7,6 +7,7 @@
 import io.deephaven.web.client.api.HierarchicalTableTestGwt;
 import io.deephaven.web.client.api.NullValueTestGwt;
 import io.deephaven.web.client.api.PartitionedTableTestGwt;
+import io.deephaven.web.client.api.storage.JsStorageServiceTestGwt;
 import io.deephaven.web.client.api.subscription.ConcurrentTableTestGwt;
 import io.deephaven.web.client.api.TableManipulationTestGwt;
 import io.deephaven.web.client.api.subscription.ViewportTestGwt;
@@ -29,6 +30,7 @@ public static Test suite() {
         suite.addTestSuite(NullValueTestGwt.class);
         suite.addTestSuite(HierarchicalTableTestGwt.class);
         suite.addTestSuite(PartitionedTableTestGwt.class);
+        suite.addTestSuite(JsStorageServiceTestGwt.class);
 
         // This should be a unit test, but it requires a browser environment to run on GWT 2.9
         // GWT 2.9 doesn't have proper bindings for Promises in HtmlUnit, so we need to use the IntegrationTest suite
diff --git a/web/client-api/src/test/java/io/deephaven/web/client/api/AbstractAsyncGwtTestCase.java b/web/client-api/src/test/java/io/deephaven/web/client/api/AbstractAsyncGwtTestCase.java
index 0035fa5ad05..7b36f3b98a5 100644
--- a/web/client-api/src/test/java/io/deephaven/web/client/api/AbstractAsyncGwtTestCase.java
+++ b/web/client-api/src/test/java/io/deephaven/web/client/api/AbstractAsyncGwtTestCase.java
@@ -250,9 +250,9 @@ protected Promise<JsTable> assertUpdateReceived(JsTable table, Consumer<Viewport
     }
 
     protected <T> IThenable.ThenOnFulfilledCallbackFn<T, T> delayFinish(int timeout) {
-        return table -> {
+        return object -> {
             delayTestFinish(timeout);
-            return Promise.resolve(table);
+            return Promise.resolve(object);
         };
     }
 
diff --git a/web/client-api/src/test/java/io/deephaven/web/client/api/storage/JsStorageServiceTestGwt.java b/web/client-api/src/test/java/io/deephaven/web/client/api/storage/JsStorageServiceTestGwt.java
new file mode 100644
index 00000000000..d37b03d4728
--- /dev/null
+++ b/web/client-api/src/test/java/io/deephaven/web/client/api/storage/JsStorageServiceTestGwt.java
@@ -0,0 +1,142 @@
+//
+// Copyright (c) 2016-2024 Deephaven Data Labs and Patent Pending
+//
+package io.deephaven.web.client.api.storage;
+
+import elemental2.promise.Promise;
+import io.deephaven.web.client.api.AbstractAsyncGwtTestCase;
+import io.deephaven.web.client.api.CoreClient;
+import jsinterop.base.JsPropertyMap;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+public class JsStorageServiceTestGwt extends AbstractAsyncGwtTestCase {
+
+    public void testStorageService() {
+        setupDhInternal().then(ignore -> {
+            CoreClient coreClient = new CoreClient(localServer, null);
+            return coreClient.login(JsPropertyMap.of("type", CoreClient.LOGIN_TYPE_ANONYMOUS))
+                    .then(ignore2 -> Promise.resolve(coreClient));
+        }).then(coreClient -> {
+            JsStorageService storageService = coreClient.getStorageService();
+            delayTestFinish(20_000);
+
+            // On startup, there are only default items
+            return storageService.listItems("", null).then(items -> {
+                assertEquals(items.toString_(), 2, items.length);
+
+                // TODO (deephaven-core#5068) remove leading slash
+                Set<String> expected = new HashSet<>(Arrays.asList("layouts", "notebooks"));
+                for (int i = 0; i < items.length; i++) {
+                    expected.remove(items.getAt(i).getBasename());
+                }
+                assertTrue(expected.toString(), expected.isEmpty());
+
+                delayTestFinish(20_001);
+                return storageService.createDirectory("notebooks/myDir");
+            }).then(ignore -> {
+                delayTestFinish(20_002);
+
+                return Promise.all(storageService.listItems("notebooks", null).then(items -> {
+                    delayTestFinish(20_003);
+
+                    assertEquals(1, items.length);
+
+                    assertEquals(JsItemType.DIRECTORY, items.getAt(0).getType());
+                    assertEquals("myDir", items.getAt(0).getBasename());
+
+                    return null;
+                }), storageService.listItems("/notebooks", null).then(items -> {
+                    delayTestFinish(20_004);
+
+                    assertEquals(1, items.length);
+
+                    assertEquals(JsItemType.DIRECTORY, items.getAt(0).getType());
+                    assertEquals("myDir", items.getAt(0).getBasename());
+                    return null;
+                }), storageService.listItems("notebooks/", null).then(items -> {
+                    delayTestFinish(20_005);
+
+                    assertEquals(1, items.length);
+
+                    assertEquals(JsItemType.DIRECTORY, items.getAt(0).getType());
+                    assertEquals("myDir", items.getAt(0).getBasename());
+                    return null;
+                }), storageService.listItems("/notebooks/", null).then(items -> {
+                    delayTestFinish(20_006);
+
+                    assertEquals(1, items.length);
+
+                    assertEquals(JsItemType.DIRECTORY, items.getAt(0).getType());
+                    assertEquals("myDir", items.getAt(0).getBasename());
+                    return null;
+                }));
+            }).then(ignore -> storageService
+                    .saveFile("layouts/myFile.txt", JsFileContents.text("hello, ", "world"), false)
+                    .then(file -> {
+                        delayTestFinish(20_007);
+
+                        assertEquals("8ebc5e3a62ac2f344d41429607bcdc4c", file.getEtag());
+                        return Promise.all(storageService.listItems("layouts", null)
+                                .then(items -> {
+                                    delayTestFinish(20_008);
+
+                                    assertEquals(JsItemType.FILE, items.getAt(0).getType());
+                                    assertEquals("myFile.txt", items.getAt(0).getBasename());
+                                    return null;
+                                }), storageService.loadFile("layouts/myFile.txt", null).then(contents -> {
+                                    delayTestFinish(20_009);
+
+                                    return contents.text().then(c -> {
+                                        delayTestFinish(20_010);
+
+                                        assertEquals("hello, world", c);
+                                        return null;
+                                    });
+                                }), storageService.loadFile("/layouts/myFile.txt", null).then(contents -> {
+                                    delayTestFinish(20_011);
+
+                                    return contents.text().then(c -> {
+                                        delayTestFinish(20_012);
+
+                                        assertEquals("hello, world", c);
+                                        return null;
+                                    });
+                                }), storageService.loadFile("layouts/myFile.txt", "8ebc5e3a62ac2f344d41429607bcdc4c")
+                                        .then(contents -> {
+                                            delayTestFinish(20_013);
+
+                                            return contents.text().then(c -> {
+                                                fail("should not have resolved");
+                                                return null;
+                                            }, error -> {
+                                                assertTrue(error.toString()
+                                                        .contains("No contents available, please use provided etag"));
+                                                return null;
+                                            });
+                                        }),
+                                storageService.loadFile("layouts/myFile.txt", "definitely-the-wrong-hash")
+                                        .then(contents -> {
+                                            delayTestFinish(20_014);
+
+                                            return contents.text().then(c -> {
+                                                delayTestFinish(20_015);
+
+                                                assertEquals("hello, world", c);
+                                                return null;
+                                            });
+                                        }));
+                    })).then(ignore -> {
+                        finishTest();
+                        return null;
+                    }).catch_(this::report);
+        });
+    }
+
+    @Override
+    public String getModuleName() {
+        return "io.deephaven.web.DeephavenIntegrationTest";
+    }
+}
diff --git a/web/client-backplane/src/main/java/io/deephaven/javascript/proto/dhinternal/io/deephaven/proto/storage_pb/ListItemsResponse.java b/web/client-backplane/src/main/java/io/deephaven/javascript/proto/dhinternal/io/deephaven/proto/storage_pb/ListItemsResponse.java
index 2cdbbfeb7bf..f6a3c7376ce 100644
--- a/web/client-backplane/src/main/java/io/deephaven/javascript/proto/dhinternal/io/deephaven/proto/storage_pb/ListItemsResponse.java
+++ b/web/client-backplane/src/main/java/io/deephaven/javascript/proto/dhinternal/io/deephaven/proto/storage_pb/ListItemsResponse.java
@@ -56,9 +56,15 @@ static ListItemsResponse.ToObjectReturnType create() {
             return Js.uncheckedCast(JsPropertyMap.of());
         }
 
+        @JsProperty
+        String getCanonicalPath();
+
         @JsProperty
         JsArray<ListItemsResponse.ToObjectReturnType.ItemsListFieldType> getItemsList();
 
+        @JsProperty
+        void setCanonicalPath(String canonicalPath);
+
         @JsOverlay
         default void setItemsList(ListItemsResponse.ToObjectReturnType.ItemsListFieldType[] itemsList) {
             setItemsList(
@@ -109,9 +115,15 @@ static ListItemsResponse.ToObjectReturnType0 create() {
             return Js.uncheckedCast(JsPropertyMap.of());
         }
 
+        @JsProperty
+        String getCanonicalPath();
+
         @JsProperty
         JsArray<ListItemsResponse.ToObjectReturnType0.ItemsListFieldType> getItemsList();
 
+        @JsProperty
+        void setCanonicalPath(String canonicalPath);
+
         @JsOverlay
         default void setItemsList(
                 ListItemsResponse.ToObjectReturnType0.ItemsListFieldType[] itemsList) {
@@ -142,10 +154,14 @@ public static native ListItemsResponse.ToObjectReturnType toObject(
 
     public native void clearItemsList();
 
+    public native String getCanonicalPath();
+
     public native JsArray<ItemInfo> getItemsList();
 
     public native Uint8Array serializeBinary();
 
+    public native void setCanonicalPath(String value);
+
     @JsOverlay
     public final void setItemsList(ItemInfo[] value) {
         setItemsList(Js.<JsArray<ItemInfo>>uncheckedCast(value));