I have an Airport Extreme with a USB hard disc attached. I have partitioned it, so I have 1 drive for backing up my computer, and 1 for media files. My problem is that the Airport doesn't let me mount only one, it has to mount both. I don't want my backup over the network, as it has personal info and whatnot inside it. However, I want to have other family members be able to watch movies from it. Is there a way to only allow one to be mounted?