If I want to use eSata for my next external HD, how hard is it to set up? I see the enclosures, and then there are the drives you buy, but do the drives just slide into the enclosures? Do I need to connect wires or dismantle anything? I'd like to be able to expand my external over the long term without buying occupying more space by just sliding more/bigger drives in the enclosure (I see there are enclosures that can house multiple drives), and eSata seems like how things will be going in the future, I just don't know how complicated it is to set up. Thanks.