Western Digital Green 3TB WD30EZRX internal hard drive (8.9 cm (3.5 inch), 5400 rpm, 2ms, 64MB cache, SATA III) (Personal Computers)
that's really the best hdd I've ever bought. Although there are only 2,7tb available but at a 4TB are also 3,5tb the greater the higher the loss. I can only recommend the HDD, it is very quiet and stores data for 100% stable. I have already 70% fille