+1 Syncthing is super handy for my core files (~10GB) synchronized between all my devices.

It more convenient than cloud storage in that I don't have to worry about sensitive information being stored on remote servers, but obviously is restricted by the storage capacity of each device.

Yeah, i keep my whole home-folder in sync with syncthing over 3 devices. Even if i am out of my office i stay connected through openvpn, so sync goes on...