I need lots mote HD storage. What I'd like to find is a rack-like device that is USB, and has free bays so you just pop in drives as you need them. Maybe something that holds at least 4 drives, and USB connection to the pc, so all drives are recognized. Linksys has somehting near this, "Linksys EtherFast Instant GigaDrive - Hard drive array", that lets you add one or two drives and hooks to the network. Just wondering if a product, thats USB, and lets you add drives, exists?