You can configure some extra works before or after backup job here:

Backup expiration setting : If you select this option ,backups in selected device will be deleted if specified period expired , this feature can help you save and recycle your storage spaces .
Execute command before job : If you need do something before the job starts , please select this option and enter a valid command line or valid bat file in command field.
Execute command after job : If you need do something after the job starts , please select this option and enter a valid command line or valid bat file in command field.