Instead of going the Time Capsule route I am planning on getting the Airport Extreme and a My Book Studio 1TB drive. I want to use the drive wirelessly and have it attached via USB to the Airport Extreme. My main concern is power...will the drive be ON all of the time? It states in the manual that it turns off with your computer but since it will be attached to the Airport Express I am worried it will be on all of the time. Thoughts? Thanks!!!