Syncthing seems to be for you. A little setting up is needed, nothing too advanced IMO. It works on LAN / WiFi and syncs your shared folder to another device. No cloud, no middlemen, not even internet (when it is set up) needed.

A fair warning: FIDESZ fucked with Magyar and his wife, so he fucked FIDESZ big time.

I’m in the same boat, except I’ve never felt any kind of remorse. How often do you feel it?