To date I've used an airport express as a wireless router for my macbook and macbook pro. Both have been manually backed up routinely on external hard drives. I use the macbook as my main media center/media storage and the hard drive is starting is nearly full. I'd like to set up a system where I move my media to an external hard drive and also automate the backup of the mb, mbp, and external hard drive. Would time capsule be the best approach for this and will it backup an external hard drive tied to its usb port. Alternatively, could I tie 2 external hard drives through a usb hub into airport extreme, using one for backing up the laptops and the other external drive?