Buffalo External Recorder Although it is an unused item, the product condition is listed as "Like New" because the box is not available. Compatibility Information You can check the compatibility information, such as supported OS, on the compatibility information page. Operating Environment [CPU] Intel Pentium 4 (2.4 GHz), Athlon 64 2800+ (1.8 GHz), AMD Fusion E series & C series or higher recommended * Intel Core2Duo 1.5GHz or higher or AMD Turion 64X2 1.8GHz or higher recommended when using the full high-definition (upscaling) playback function. [Memory] 1GB or more (32bit), 2GB or more (64bit) [HDD] 2GB or more free space (7GB or more free space recommended), approximately 150MB for installing the attached software * 5GB or more free space as a working area (20GB or more recommended) [Display] 1024×768, 32 bit or more * 1280×1024 (SXGA) or higher recommended * An internet connection is required to use the copyright protection function. Temperature 5-35℃, humidity 20-80% (no condensation) Compatible Models Windows PCs with USB interface, Mac computers 10.8/10.9/10.10, Surface 3, Surface Pro 3, Surface Pro 4, Surface Book * For models without a USB port, please use "[http://buffalo.jp/products/catalog/storage/interface.html: Our expansion interface]". Recommended Media (as of May 2012) Please see the "Blu-ray/DVD Drive Recommended Media List" for details.