It was this one http://www.bestbuy.com/site/mainstream-1tb-internal-serial-ata-hard-drive-for-laptops/9314126.p?id=1219011390341&skuId=9314126&st=categoryid&cp=1&lp=5#tab=specificationsI had thought about a hybrid drive but was reading that sony isn't officially supporting their use so was like I'd just stick with that one from best buy.