Unexpected end of file while reading beginning of backup set. Confirm that the media contains a valid SQL Server backup set, and see the console error log for more details.
Event Information
CAUSE: The RESTORE operation failed because it could not read some portion of the backup file specified in the FROM clause. This error generally indicates that the file specified is a pre-SQL Server 7.0 backup or that the file is damaged.
RESOLUTION:
Verify that the file specified in the RESTORE operation is a valid SQL Server 7.0 or later backup. Verify that the backup file is not damaged or incomplete.