[idea] Backup to SD

There are couple of backup related questions but none of them directly concerning this problem. I was thinking what is the point of backing up if the backup will be deleted within factory reset. I had to make a factory reset to my jolla and backed up everything before doing so. After reset there weren't any backups left. And IMO factory reset is the main reason for doing a backup. So, it would be great if backup would be made to SD-card so it won't get deleted by factory reset. Or maybe some other way to save the backup through reseting.