Just make sure to make a copy of 'Profile Data' file right before using your keys and don't do anything except looting that golden chest.
Start game and use them again if you wish. This time you will not have to select destination.Īfter this step all keys available before making a copy of profile data will be restored.
To do this click triangle button and select 'Copy' and select USB stick as target location.
You should see it under PS3 games saves section at first or second place in the list.