External HDD case compatible with USB 3.0/2.0, includes AC adapter, and features an auto-off function. - Model: HDCL-UTE1K - Country of Manufacture: Japan - Interface: USB 3.0/2.0 - Power: AC adapter - Includes a 1m USB cable. I'm not very knowledgeable about PC hardware, so I may not be able to answer your questions fully. Also, I don't know if there are any defects. Thank you for your understanding. Thank you for looking.