Seagate Constellation CS ST3000NC002 Internal HDD 3.5 "SATA III 7200 rev / min 3 TB (Accessory)
Product of a very high quality, I have several to store family photos, all housed in my little NAS. I am very happy, although I think the price is slightly high, but hey there is a high and well above average MTBF to those of large distribution disks