I go to school 200 miles away from home and want to have a backup HD at home, Which I can access remotely from school. I run XP and am trying to avoid having a computer at home just to access the HD. If a computer is nessesary, how to set it up for me to login. I will be buying a external which can be attatched Via USB AND attatched to my home network via ethernet/cat 5 cable