I purchased this at the beginning of the month and used it for about a day, but I bought another recorder, so it's practically unused. The instruction manual is missing, but you should be able to find it with a web search. I bought it on Amazon for 11,900 yen. Here's the Amazon description: [Amazon.co.jp Limited] Buffalo External Hard Drive 2TB TV Recording/PC/PS4/4K Compatible Buffalo nasne™ Compatible Quiet & Compact Made in Japan Failure Prediction Mimamori Signal HD-AD2U3 Capacity: 2.0TB [Compatible Devices] Windows PCs and Macs 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 [Warranty Period] 1 year Made in Japan *Data recovery services are all fee-based. Transfer speed (standard value): USB3.1 (Gen1)/3.0: up to 5.0Gbps, USB2.0: up to 480Mbps