My wife has a four-year-old Micron Millenia MAX GS133 PC that she only uses for e-mail and surfing. It has a 30GB ATA Hard Drive that is getting fairly full. We are not ready to buy her a new PC as yet. Would we be able to add another similar HD, and if so how should it be connected so that we can get the best benifit of the addition? It apears that ATA HDs are cheap. I realize that this is practically a "throw-away" deal.