Backup Device (General Page)
Use the General page to specify or view the general properties of a logical backup device.
To use SQL Server Management Studio to view the contents of a backup device
The backups on a set of one or more backup devices compose a single media set. A media set is an ordered collection of backup media, tapes or disk files, to which one or more backup operations have written using a fixed type and number of backup devices. For information about media sets, see Media Sets, Media Families, and Backup Sets.
The physical backup device corresponding to a logical backup device is initialized when the first backup in the media set is written to the logical backup device. If the physical backup device is a file that does not exist yet, it is created at that time.