Seagate Constellation ST2000NM0011, 2 TB, 7200 RPM, 64 MB, 3.5", Serial ATA III Seagate Constellation ST2000NM0011. HDD capacity: 2 TB, HDD speed: 7200 RPM, Storage drive buffer size: 64 MB, HDD size: 3.5", Interface: Serial ATA III