So I'm wanting to upgrade my 13" Macbook (early 2008) from a 120 GB to the Hitachi 7500TK 500 GB. The goal is to swap out the HDD on the Macbook and put the new HDD on there. But I'll need an enclosure to put the old HDD in. I only need the enclosure merely to store and protect the old HDD, just in case something went wrong with the new one and I'd need to put the old one back in. Because my purposes would merely be for that, does it matter which type of enclosure I get? Because I see them vary in price, from as low as $15 to around $50. Would a cheap $15-$20 enclosure suffice? Thanks!