I'm currently running kubuntu 23.10 and have been distro hopping a lot lately. I'm going to continue to do so but the tedium of saving everything off is a royal pain.

Backup solutions across distro's don't always work, plus the overhead of backing up and restoring is almost more work than just copy/pasting most stuff.

In windows obviously, you're damn near forced to use one drive these days, and it made me wonder if there is a similar cloud service, or self hosted service that might accomplish a similar task.

I've got an unraid server I can use, and there are options there it appears, but the choices are almost overwhelming.

So I thought I'd just ask all of you, what solution mimics a cloud desktop like onedrive the closest?

EDIT: To be more specific, I'm mostly just referring to dekstop contents, Documents, Downloads etc, Not config data. Bonus points if I can add folders too.

EDIT2: Thank you everyone for your awesome suggestions! I went with syncthing. I also tried Mega which crashed pretty much instantly for some reason. Syncthing seems to be exactly what I need and I can just point it at my Unraid server.