WD 3.5 SATA HDD,Hard Disk (for Western Digital)1.Capacity: 80/160/250/500/640/750/800GB, 1/1.5/2 TB2.Interface:SATA 3 Gb/s3.Transfer Rates:Buffer To Host (Serial ATA) 3 Gb/s (Max) 4.Buffer Size: 8MB 5.Dimensions and weight:    Height:1.028 Inches   Length:5.787 Inches   Width:4.00 Inches   Weight:1.61 Pounds6. Temperature :Operating 32° F to 140° F / Non-operating -40° F to 158° F
As used for storage capacity, one megabyte (MB) = one million bytes,
one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second. **We supply original parts**