[Pre Order - allow extra time] Seagate 20TB Exos X20 7200 rpm SATA III 6 Gb/s 3.5" Internal HDD (OEM) 20TB Storage Capacity, 3.5" Form Factor, SATA III 6 Gb/s Interface, 256MB Cache, 7200 rpm, Data Transfer Speeds up to 285 MB/s, 2,500,000 Hours MTBF,...