<p>If instead, your Tails USB stick does start but the Persistent Storage fails to unlock, refer to our instructions on [[recovering data from the Persistent Storage when it has file system errors|fsck]].</p>
<p>We recommend you always keep a current backup of your Persistent Storage. To learn how to create a backup of your Persistent Storage, see our [[instructions on how to back up your Persistent Storage to another Tails USB stick|backup]].</p>
If doing a manual upgrade doesn't work, you might be able to unlock your Persistent Storage from another Tails USB stick and copy its content using `rsync` on the command line.
If unlocking your Persistent Storage from another Tails USB stick fails, you might be able to recover some or most of your data from a partition image using advanced forensics tools.