Buffalo external hard drive 4TB HD-AD4U3. I purchased it from Amazon and used it for recording and saving on my home TV. I have never experienced any problems or errors. I will carefully pack it to prevent scratches and water damage, and ship it in a cardboard box. Capacity: 4.0TB [Compatible Models] Windows PCs and Macs equipped with USB3.1 (Gen1) / USB3.0 / 2.0 Type-A terminals, Compatible OS: Windows 10/8.1/7, Mac OS X 10.11 or later [Compatible TVs] Sharp "Aquos", Sony "Bravia", Panasonic "Viera", Buffalo "nasne", Hisense, Toshiba "Regza", FUNAI, Orion, Mitsubishi Electric, LG Electronics, Hitachi "Wooo", Pixela, DX Antenna, Deon (See the manufacturer's website for details on compatible models) [Connection Standards] USB3.1 (Gen1) / USB3.0 / 2.0 [Size] External dimensions (width x height x depth): 114 x 33 x 171mm *excluding protrusions, Weight: approx. 900g Power supply: AC power