Thank you for viewing. This is a network hard disk purchased in February 2018. I used it mainly for data backup, so I don't think it was powered on for very long. I have confirmed its operation with Win11 & Win10. This product is not an HDD that is directly connected to a PC. It is an HDD on the network. Please purchase this if you are somewhat familiar with networks. There are people who ask questions in the comments like "What are IP addresses and subnet masks?", but I cannot teach you that much. I have thoroughly tested its operation before listing it. (I was using it normally until just before listing) The disk has been formatted and returned to its factory settings. I cannot accept returns due to malfunctions caused by your PC environment or LAN environment. The outer box also has the purchase date written on it. There are traces of tape from a label maker on the item for identification. Please consider purchasing if you agree to the above. Accessories include an AC adapter and a LAN cable (I will provide a 1-meter cable as the original one is missing). (A CD-ROM was not included from the beginning.) *Seller's memo: NASHDD14