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sync
online
When connecting to a server, you can choose between Online and Smart Synchronization connect mode.
In _Online_ connect mode, changes to a file are immediately uploaded and in sync when an application has finished saving a file.
In _Smart Synchronization_ connect mode, files are copied to a local cache for faster access prior synchronization with the server in the background.
| Online | Smart Synchronization | |
|---|---|---|
| Offline Access | – | Save files in cache on disk for access with no server connectivity |
| Index Files | – | Index folder contents in cache on disk for access with no server connectivity |
| Buffer file contents | ︎Temporarily save opened files for faster access later | Temporarily save opened files to copy to cache on disk |
| Synchronization | Changes are immediately uploaded | Synchronize changes in the background |
| Transfer Progress | Upload shown in progress window in Finder.app or Windows Explorer | Uploads shown in the status bar (macOS) or taskbar (Windows) |
| Recent Files | – | Available in the status bar (macOS) or taskbar (Windows) |
| Lock Files | ✔︎ | ✔ |
| Share Files | ✔ | ✔ |
Mountain Duck displays the overall quota present on the server as available disk space on the mounted volume.
| Protocol | Support |
|---|---|
| Local Disk | ✅ |
| SFTP | ✅ |
| FTP | ❌ |
| WebDAV | ✅ |
| Google Drive | ✅ |
| Google Cloud Storage | ❌ |
| Microsoft OneDrive | ✅ |
| Microsoft Sharepoint | ✅ |
| Files.com | ❌ |
| DRACOON | ✅ |
| Backblaze B2 | ❌ |
| Box.com | ❌ |
| Dropbox | ✅ |
| Nextcloud | ✅ |
| ownCloud | ✅ |
| S3 | ❌ |
| SMB | ✅ |
| Windows Azure | ❌ |
| OpenStack Object Storage | ✅ |
: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.
Quota support can be [disabled](../../protocols/sftp/index.md#free-space-calculation-is-incorrect) for all protocols.