Western Digital Blue. Hard drive capacity: 320 GB, Hard drive interface: Serial ATA III, Hard drive speed: 5400 RPM. Power consumption (standby): 0.16 W, Power consumption (read): 1.4 W, Power consumption (write): 1.4 W. Width: 69.8 mm, Height: 7 mm, Depth: 100.2 mm

Western Digital Blue Mobile. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA, Hard drive speed: 5400 RPM. Power consumption (standby): 0.16 W, Power consumption (read): 1.4 W, Power consumption (write): 1.4 W. Windows operating systems supported: Windows 7 Enterprise,Windows 7 Enterprise x64,Windows 7 Home Basic,Windows 7 Home Basic x64,Windows , Mac operating systems supported: Mac OS X 10.6 Snow Leopard,Mac OS X 10.7 Lion,Mac OS X 10.8 Mountain Lion,Mac OS X 10.9 Mavericks. Width: 69.8 mm, Height: 7 mm, Depth: 100.2 mm

Seagate 500GB SATAIII, Barracuda. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (typical): 5.3 W, Power consumption (standby): 0.94 W, Power consumption (off): 0.94 W. Width: 101.6 mm, Height: 20.2 mm, Depth: 147 mm

Western Digital Blue. Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (standby): 1.2 W, Power consumption (read): 6.8 W, Power consumption (write): 6.8 W. Width: 147 mm, Height: 25.4 mm, Depth: 101.6 mm. Data transfer rate: 6 Gbit/s, Number of products included: 1 pc(s)

Western Digital Black Mobile. Hard drive capacity: 320 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (standby): 0.25 W, Power consumption (off): 0.25 W, Power consumption (read): 2 W. Width: 69.8 mm, Height: 9.5 mm, Depth: 100 mm

Western Digital WD5000LPLX. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (standby): 0.25 W, Power consumption (off): 0.25 W, Power consumption (read): 2 W. Width: 69.8 mm, Height: 9.5 mm, Depth: 100 mm

Seagate 2TB SATAIII, Barracuda. Hard drive capacity: 2000 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (typical): 8 W, Power consumption (standby): 0.75 W, Power consumption (off): 0.75 W. Width: 101.6 mm, Height: 20.2 mm, Depth: 147 mm

Western Digital Black. Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (standby): 0.2 W, Power consumption (read): 1.8 W, Power consumption (write): 1.8 W. Width: 69.8 mm, Height: 100.2 mm, Depth: 9.5 mm

Western Digital Red Mobile. Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA III, Hard drive speed: Variable. Power consumption (standby): 0.2 W, Power consumption (read): 1.4 W, Power consumption (write): 1.4 W. Width: 69.8 mm, Height: 9.5 mm, Depth: 100.2 mm

Seagate SkyHawk 2TB, Surveillance HDD. Hard drive capacity: 2000 GB, Hard drive interface: Serial ATA III, Hard drive size: 3.5". Power consumption (typical): 5.6 W, Power consumption (standby): 0.5 W, Power consumption (off): 0.5 W. Width: 101.8 mm, Height: 26.1 mm, Depth: 147 mm

Western Digital Black. Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA III, Hard drive speed: 7200 RPM. Power consumption (standby): 0.8 W, Power consumption (PowerSave): 0.8 W, Power consumption (read): 6.8 W. Width: 101.6 mm, Height: 25.4 mm, Depth: 147 mm. Data transfer rate: 6 Gbit/s

Western Digital Blue Mobile. Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA, Hard drive speed: 5400 RPM. Power consumption (standby): 0.18 W, Power consumption (off): 0.18 W, Power consumption (read): 1.7 W. Width: 69.8 mm, Height: 7 mm, Depth: 100.2 mm. Colour of product: Black, Grey, Data transfer rate: 6 Gbit/s, Connectivity technology: Wired

Seagate SkyHawk ST4000VX007. Hard drive size: 3.5", Hard drive capacity: 4000 GB, Hard drive interface: Serial ATA III, Device type: HDD, Drive device, buffer size: 64 MB

Seagate Barracuda ST3000LM024. Hard drive size: 2.5", Hard drive capacity: 3000 GB, Hard drive speed: 5400 RPM, Hard drive interface: Serial ATA III, Device type: HDD, Drive device, buffer size: 128 MB

Western Digital Red. Hard drive capacity: 4000 GB, Hard drive interface: Serial ATA III, Hard drive speed: Variable. Power consumption (standby): 0.4 W, Power consumption (read): 4.5 W, Power consumption (write): 4.5 W. Width: 101.6 mm, Height: 26.1 mm, Depth: 147 mm. Colour of product: Black, Data transfer rate: 6 Gbit/s, Connectivity technology: Wired

Western Digital Blue 3TB. Hard drive capacity: 3000 GB, Hard drive interface: Serial ATA III, Hard drive speed: 5400 RPM. Power consumption (standby): 0.1 W, Power consumption (read): 2 W, Power consumption (write): 2 W. Width: 69.8 mm, Height: 15 mm, Depth: 100.2 mm