I have a problem restoring my backups. Have done it successfully on my hard drive and external drive.

The error reads:

There is a problem with the restore process. It could be caused by one of the following:
• The backup dis is not properly inserted into the selected drive.
• An incorrect backup disk is used.
• The backup disk is corrupt
• The hard drive is full
• An incorrect restore drive is selected

Does anyone know how to solve the problem

Thanks in advance