Add information about quota support

mountainduck/connect/index.md

@@ -31,3 +31,36 @@ In _Smart Synchronization_ connect mode, files are copied to a local cache for f
 | **[Recent Files](sync.md#recent-files)** | –                                                                     | Available in the status bar (macOS) or taskbar (Windows)                      |
 | **[Lock Files](../locking.md)**          | ✔︎                                                                    | ✔                                                                             |
 | **[Share Files](../share.md)**           | ✔                                                                     | ✔                                                                             |
+
+## Quota support
+Mountain Duck displays the overall quota present on the server as available disk space on the mounted volume.
+
+| Protocol                 | Support |
+|--------------------------| :---: |
+| [Local Disk](../../protocols/index.md#local-disk)  | ✅ |
+| [SFTP](../../protocols/sftp/index.md#free-space-calculation-is-incorrect)  | ✅ |
+| [FTP](../../protocols/ftp.md)                      | ❌ |
+| [WebDAV](../../protocols/webdav/index.md)			 | ✅ |
+| [Google Drive](../../protocols/googledrive.md)     | ✅ |
+| [Google Cloud Storage](../../protocols/googlecloudstorage.md)  | ❌ |
+| [Microsoft OneDrive](../../protocols/onedrive.md#quota)  | ✅ |
+| [Microsoft Sharepoint](../../protocols/sharepoint.md#quota)  | ✅ |
+| [Files.com](../../protocols/files.com.md)          | ❌ |
+| [DRACOON](../../protocols/dracoon.md)              | ✅ |
+| [Backblaze B2](../../protocols/b2.md)              | ❌ |
+| [Box.com](../../protocols/box.md)                  | ❌ |
+| [Dropbox](../../protocols/dropbox.md)              | ✅ |
+| [Nextcloud](../../protocols/webdav/nextcloud.md)   | ✅ |
+| [ownCloud](../../protocols/webdav/nextcloud.md)    | ✅ |
+| [S3](../../protocols/s3/index.md)                  | ❌ |
+| [SMB](../../protocols/smb.md)                      | ✅ |
+| [Windows Azure ](../../protocols/azure.md)         | ❌ |
+| [OpenStack Object Storage](../../protocols/openstack/index.md)  | ✅ |
+
+```{admonition} Limited Support
+:class: attention
+- **[Microsoft OneDrive](../../protocols/onedrive.md#quota)**: Quota is only supported when setting the *Path* in the bookmark configuration to a folder different from `/`.
+- **[Microsoft SharePoint](../../protocols/sharepoint.md#quota)**: Quota is only supported when setting the *Path* in the bookmark configuration to a *Drives* folder in a SharePoint site folder.
+```
+
+Some protocols do not report the available quota. Finder and Windows Explorer will show exabyte values in *Online* connect mode and the available space within the synchronization cache location on your local disk in *Smart Synchronization* connect mode for the affected protocols.

protocols/onedrive.md

@@ -104,3 +104,6 @@ It is not possible to create a top level folder in Mountain Duck or Cyberduck. I
 |-------------|:--------------:|
 | My Files    | Personal files |
 | Shared      | Shared folders |
+
+### Quota
+Mountain Duck can only display the correct cloud storage quota as remaining disk space when setting the *Path* in the bookmark configuration to a folder different from `/`, for example `My Files`.

protocols/sharepoint.md

@@ -108,3 +108,6 @@ It is not possible to create a top level folder in Mountain Duck or Cyberduck. I
 | Drives      |
 | Groups      |
 | Sites       |
+
+### Quota
+Quota reporting is only supported for the *Drives* folder within their respective site folder.