nostr:npub125jyrgxxazvntpzdq88myjt5tvdnnvxdfymv2k2txrzvfgl3z6wsq2hlwy Check out Unison https://github.com/bcpierce00/unison/  You'd have to do some scripting/OS stuff, but it is fast, works well, and runs on most anything.  The extra control might not be a bad thing.  I ran owncloud (or nextcloud... I forget) for awhile, and dumped it after a year.