[Zubersoft]

Well you would have had to have selected a folder to create the backup file in. For example, if you create the backup file under /storage/emulated/0/Downloads, then when you connect your tablet to your PC using a USB cable, you should be able to view the internal tablet storage and view the Downloads folder to see the .msb file. It may be easier if you upload the backup file to the cloud. If you already created a backup file, use the Dropbox, Google Drive or OneDrive app to upload the file, then restore the backup file from the cloud on the new tablet.

Mike