Seagate Desktop HDD Barracuda 3.5 Inch Hard Drive Kit 1-TB, 1 TB, 7200 RPM, 32 MB, 3.5", Serial ATA Seagate Desktop HDD Barracuda 3.5 Inch Hard Drive Kit 1-TB. HDD capacity: 1 TB, HDD speed: 7200 RPM, Storage drive buffer size: 32 MB, HDD size: 3.5", Interface: Serial ATA