JacobsParts 320GB 2.5" Green Mesh USB External Portable Hard Drive Interface: USB 2.0 (480Mbps) Drive Brand: Western Digital Drive Type: 2.5" SATA Drive Size: 320GB Drive Speed: 5400RPM Drive Cache: 8MB Case Condition: Brand New Drive Condition: factory refurbished,Preformatted with FAT32 filesystem for maximum compatibility. Attractive wire mesh design protects and cools the drive Powered by USB bus, no external power supply needed An extra USB connector is found on the computer end of the USB cable. It allows the device to draw additional power from another USB port. Use is optional. Fully Supported by Windows XP, Windows Vista, Windows 7, Mac OS X, and Linux. No drivers needed. LED power indicator changes color to indicate hard drive activity Hot-swappable