I regularly back up to shares. I'd expect that these are not safe, either. For this very reason I do regular backups of the backup (on the NAS, which is a Linux

I regularly back up to shares. I'd expect that these are not safe, either. For this very reason I do regular backups of the backup (on the NAS, which is a Linux box). These backups can only be seen as read-only share (and are not advertized).