4TB, 3.5", SATA 6Gb/s, 7200 RPM, 128MB
Western Digital Red Pro, 4 TB, 7200 RPM, 128 MB, 3.5", Serial ATA III
Western Digital Red Pro. Hard drive capacity: 4 TB, Hard drive rotational speed: 7200 RPM, Storage drive buffer size: 128 MB, Hard drive size: 3.5", Host interface: Serial ATA III