Under Storage, if I click on the backup button, I get a dialog box to save the database (that is on a USB stick) into a file. In the end I get a file about 1.5MB. How is this file used? Restored? Can I just dd this to another USB stick?
From the section [Storage] you can select the partition in which you want to restore the backup file and press the [Restore DB] button. After you pick the file that contains the backup, it will be restored in a new database. You have to activate it if you want that the system start with the configuration stored in the backup.