ST4000DM000 Seagate 3.5 "4000 GB serial_ata150 (Personal Computers)
Of course the title is there to laugh! This disc serves as backup for my two hard drives of 2TB (Games and data). 7200 RPM, 4TB, 64MB Cache, need I say more! If Ha! Seagate Quality oblige! Silent and efficient! In short, I highly recommend.