Intenso MemoryCase 2.5" USB 3.0 Portable Hard Drive Specifications Capacity: 500GB Hard Disk Type: 2.5" Colour: White Material: Plastic LED activity display: YES Interface: Super Speed USB 3.0 (5 Gbit / sec.) Maximum data transfer rate: Read: 85.00 MB/s (570x) Write: 75.00 MB/s (503x) Speed / Cache: 5400 RPM / 8 MB File Format: FAT32 Weight: 165 grams Dimensions: 13 x 78 x 127 mm Power supply: USB 3.0 (Downward Compatible with USB 2.0) Accessories included: USB 3.0 data - power cable (Downward Compatible with USB 2.0) Operating system: MAX OS X 10.0 and higher, Microsoft Windows XP/Vista and 7* Please note: For the USB 3.0 operation an USB 3.0 interface card is needed. The hard disk is downward compatible with the previous USB standards. Your PC’s hardware configuration as well as the operating system employed can influence the compatibility of the hard drive. Power supply under USB 2.0: If your USB 3.0 hard disk is not recognized on your PC with a USB 2.0 connection, this could probably be caused by the power supply. In this case, please connect an USB hub with an external power supply. * Recommended to install all available operating system service packs, patches and update system drivers to latest versions to increase performance and system stability. 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