My Book Studio External Hard Drives 2 TB, FireWire 800, USB 2.0 Pure performance for Mac. Designed for Mac, My Book Studio external drives feature a customizable e-label, automatic, visual backup, and password protection. The high-performance FireWire 800 interface gives you the speed you need for creative endeavors like photo and video editing and graphic design.   Performance Specifications Serial Transfer Rate FireWire 800 Serial Bus Transfer Rate (1394b) 800 Mb/s (Max) USB 2.0 Serial Bus Transfer Rate (USB 2.0) 480 Mb/s (Max) Physical Specifications Capacity 2 TB Interface FireWire 800, USB 2.0 Physical Dimensions English Height 6.50 Inches Length 5.3 Inches Width 1.9 Inches Weight 2.60 Pounds Metric Height 165 mm Length 135 mm Width 48 mm Weight 1.18 kg Environmental Specifications Temperature (English) Operating 41° F to 95° F Non-operating -4° F to 149° F Temperature (Metric) Operating 5° C to 35° C Non-operating -20° C to 65° C Electrical Specifications Current Requirements Power Dissipation AC Input Voltage 100-240 VAC AC Input Frequency 47-63 Hz 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.