Anyways, if you're at the grocery store and you need to see your shopping list, and you're happy with your current workflow of opening up Termux and typing `rsync -avrsomgwtfbbq me@server/shopping-list.txt` with your thumbs, then by all means keep doing that! For the rest of us, there's Syncthing.
FTP is not encrypted. Unless you use SFTP maybe. (I wrote an SFTP and FTP-over-SSH client in Visual Basic like 20 yesrs ago lol).
And even then, you miss out on all the optimizations with prolly trees and other goodness that rsync has.
No, sorry, that solution sucks. CVS? That’s super outdated.