I'm sure this has been asked plenty of time but i haven't been able to find an thread that asked to questions i am about to. I'm wanting to purchase a NAS device for home/personal use. I'd like it to have 4 drive bays, one bay for my iTunes library and other misc. and another for my iPhoto library, Final Cut, video media dump. The other 2 drives i'd like to back up the first two, is this possible? And usable? or would it be too slow?