Hi RomanZ, Thanks for your answer.. I saw the debub.txt and forgot I turned it on, it's now better ! As for the db-wal, I restarted and changed the sync on debian to read-only as I only use it as a backup storage. I now have a new db-wal, but, is it safe to delete it sometimes ? News problem, since then, my sync cannot be terminated ! I have 9kb unsynced and can't find wich file is causing it ! Is there any method to know wich file cause that ? I already try rebooting all the machines, without success.