Sata is serial ata, There different speeds but the connection is standard. Here a link for an example. http://www.scan.co.uk/products/250-gb-western-digital-wd2500bevt-scorpio-blue-25-sata-300-5400-rpm-8mb-cache-12-ms?utm_source=google+shopping
You will need a 9mm drive that is the thickness. Also read some of the post on the forum. Good luck M