[Oz Cello]

You'll need to have the app running on the table and access to the back-up file from the tablet (e.g. copy it to the tablet). Then open the app on the tablet and select 'restore library from backup' from the menu. There are full details in the manuals which can be found here - https://www.zubersoft.com/mobilesheets/manual/. There's also info there about how to create the backup in the first place if you need it.
Guy