Hi, I have a first generation Core 2 Duo macbook. I need to upgrade the hard-drive and plan on buying and installing this one: http://eshop.macsales.com/item/Seagate/ST9500420AS/ I want to make sure that this hard-drive will work. As I understand since it is SATA it will work fine, and there is no reason it wouldn't work because of its size, correct? Thanks a lot. I just want to be sure.