Thank you @laurent

I think the server is fast enough. I have gigabit ethernet throughout and just purchased and updated my home server.

The local file sync on the Mac and the NextCloud sync went very quickly. The NextCloud sync between the Mac and NextCloud server was almost as fast as the Joplin local file sync.

Unfortunately, I can't get the Android Joplin permissions to work to read the NextCloud synced files. Here is the screenshot.

I am not sure how to fix this error.

I'll create a backup and then try WebDAV and see how quickly it goes.

If I just change the sync method and point it to the folder on NextCloud will this sync properly or will it wipe out all the files?