For my personal devices, I also use Syncthing.. but I do not keep revisions. Instead, I have push only from Laptop (etc) and on a server running ZFS I take aut

For my personal devices, I also use Syncthing.. but I do not keep revisions. Instead, I have push only from Laptop (etc) and on a server running ZFS I take automatic hourly, daily, weekly and monthly snapshots which are auto-purged set on my retention strategy. It is much more efficient on disk space. Occasionally, I will run rsync across the device by hand just to check consistency - but so far it has been reliable.