Intenso MemoryBoard 2.5" Portable Hard Drive Specifications Capacity: 750GB Hard Disk Type: 2.5" Colour: Silver Material: Aluminium LED activity display: YES Interface: High Speed USB 2.0 Maximum data transfer rate: Read: 33.00 MB/s (221x) Write: 35.50 MB/s (238x) Speed / Cache: 5400 RPM / 8 MB File Format: FAT 32 Weight: 160 g grams Dimensions: 15 x 82 x 128 mm Power supply: USB port no external power supply is required Accessories included: USB data - power cable Operating system: LINUX 2.4 and higher, MAX OS X 9.0 and higher, Microsoft Windows 98/SE/ME/2000/XP/Vista and 7* * Recommended to install all available operating system service packs, patches and update system drivers to latest versions to increase performance and system stability. Windows 98 SE: At first please install the Win98 driver from manufacturer official homepage. The FAT32 file system used by default by the hardware manufacturer to obtain the highest compatibility can be changed by the user following the OS manufacturer instructions. Note: 1 megabyte (MB) = 1 million bytes, 1 gigabyte (GB) = 1.000 billion bytes. Part of the capacity is used to format and perform other functions and thus is not available for data storage. Write and Read Speeds as stated by manufacturer, specifics may be obtained contacting directly their technical department. Reflected speeds may not be attainable under some circumstances, and depend on hardware, software and settings used. x=150KB/sec