hello Oriolauge234...

Is Sync working on any other devices?

If that is the only device that has ever been connected to your Sync account you were miss-using Sync. Sync is not intended for backup purposes with a single device.

The problem with using it in that manner usually turns out to be that the user reset their Sync / Firefox Account password, which clears all data for that account on the Sync server. Sync data is encrypted via the original password and that data can't be decrypted with a different password. thus the data is useless and is cleared so the account can get a fresh load of data allowing the user to keep using their Firefox Account.

Ok, so yesterday I remembered that I had my virtual machine in the hardrive, so I reinstalled virtualbox and tried to run my virtual machine, and it worked! So I just synced my account with the virtual machine, and I have everything back. Thanks for the help!

thank you