Hi Chris,
Device Backup feature creates back up of the device configuration values in Wireless Manager.
Backup from Device will take back up of the current device configuration while Backup from Database will backup the values already stored in database.
Scheduled Tasks doesn’t have option to automatically back up the device configuration.
Hope this answer your queries.
If you have further queries, pls. let us know. We will be happy to answer / resolve them.
Warm Regards,
Aman