This is a Buffalo HD-CE1.0TU2 1.0TB USB 2.0 external hard drive. (Product Specifications) - Interface: USB 2.0/1.1 (Type B x 1) - Capacity: 1.0TB - Power: AC100V 50/60Hz - Weight: Approximately 1kg (Features) TurboUSB function: Function to speed up data transfer Power-saving mode: Equipped with a mode to reduce power consumption Utilities: TurboUSB, Disk Formatter The data is formatted and there are no operational issues. However, this is a used item that has been stored at home for a long time, so please refrain from purchasing if you do not understand this. Thank you.