Free Shipping! Seagate 20TB Storage Capacity, 3.5" Form Factor, SAS III 12 Gb/s Interface, 256MB Cache, 7200 rpm, Data Transfer Speeds up to 285 MB/s, 2,500,000 Hours MTBF, 8760 Power-On Hours per Year, 0.35% Annualized Failure Rate (AFR)