Seagate EE25 Series 20GB SATA, 20 GB, 5400 RPM, 8 MB, 2.5", Serial ATA Seagate EE25 Series 20GB SATA. HDD capacity: 20 GB, HDD speed: 5400 RPM, Storage drive buffer size: 8 MB, HDD size: 2.5", Interface: Serial ATA