- Check that all the devices have enough storage space on the location
- Make certain all the users have the appropriate permissions to the shared folder.
- Temporarily disable any other backup program or file synchronization tool running on your device, such as macOS Time Machine, Dropbox, Google Drive, etc.
- Ensure that the folder doesn’t include any system files, such as OneDrive Desktop.ini, Thumbs.db, .DS_Store that need to be excluded.
- Manually remove any files from the local folder that might conflict with those in the cloud.
- Confirm that OneDrive is configured to sync the shared folder.
- Check the OneDrive activity center and review any error messages.