Each time you perform a backup, Backup creates a backup set containing the backed up files. You can store more than one backup set in a backup file. After backing up files for a while, you might find a number of unneeded backup sets accumulating in a backup file. You can delete these sets quickly and easily from the backup file within Backup. When you delete a backup set, only the backup set is deleted, but the backup file, such as Backup.bkf, remains in the backup location. If you want to delete the backup file, drag the file icon into the Recycle Bin as you would any other Windows file.