Nextcloud Mac OS VFS Troubleshooting

Folders either empty or not syncing at all

• Remove ~/Library/Application Support/FileProvider/com.nextcloud etc (this is where the configuration files that tell macOS to mount its providers go - Strongsync doesn't properly clean these up when you delete the connection).
• Uninstall Nextcloud (unless you intend to re-establish some connections; if you don't uninstall it, the folder above will re-appear, albeit harmlessly with just some default entries).
• Restart your Mac (must be a restart, not a logout/in, or macOS won't let go enough for you to do the next step).
• Go to ~/Library/CloudStorage in the Finder. Delete the folders that start with Nextcloud (you can select and command-delete or drag them to the trash, whichever you prefer). Finder will prompt you for authentication; provide it.

This will do a full reset on the VFS