1.0TB high-speed transfer model, external hard drive compatible with USB 3.0. - Brand: BUFFALO - Model: HD-LB1.0TU3-WHD - Storage Capacity: 1.0TB - Connection Interface: USB 3.0/2.0 - Supported OS: Mac/Windows - Features: High-speed transfer model Includes accessories and instruction manual. Thank you for viewing. Although unused, the outer box has deteriorated slightly due to home storage, but the contents are not affected. Opened for photographing and inspection of the main unit.