diff --git a/v3/swagger/agent.json b/v3/swagger/agent.json
index 63876d786..028871831 100644
--- a/v3/swagger/agent.json
+++ b/v3/swagger/agent.json
@@ -1687,6 +1687,11 @@
         "data_directory": {
           "description": "First entry from `data_file_directories` list from scylla config file.",
           "type": "string"
+        },
+        "storage_size": {
+          "description": "Total disk size of the first entry from `data_file_directories` list from scylla config file. In bytes.",
+          "type": "integer",
+          "format": "uint64"
         }
       }
     }
diff --git a/v3/swagger/gen/agent/models/node_info.go b/v3/swagger/gen/agent/models/node_info.go
index f85a11728..c2ed167db 100644
--- a/v3/swagger/gen/agent/models/node_info.go
+++ b/v3/swagger/gen/agent/models/node_info.go
@@ -95,6 +95,9 @@ type NodeInfo struct {
 	// Whether Scylla supports uuid-like sstable naming.
 	SstableUUIDFormat bool `json:"sstable_uuid_format,omitempty"`
 
+	// Total disk size of the first entry from `data_file_directories` list from scylla config file. In bytes.
+	StorageSize uint64 `json:"storage_size,omitempty"`
+
 	// Uptime in seconds.
 	Uptime int64 `json:"uptime,omitempty"`
 }