Thank you for viewing. This is a network hard disk purchased in October 2019. I mainly used it for data backup, so I don't think it was powered on for very long. I have confirmed its operation on 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. I have received comments asking what IP addresses and subnet masks are, but I cannot provide that information. I have thoroughly tested its operation before listing it for sale (I was using it normally until just before). The disk has been formatted and returned to its factory settings. I cannot accept returns due to malfunctions caused by your PC or LAN environment. The outer box also has the purchase date written on it. The product has some minor scratches (see photos) and traces of tape used for identification with a label maker. There are no functional problems. If you agree to the above, please consider purchasing. Accessories include an AC adapter and a LAN cable. (A CD-ROM was not included from the beginning.) ※Seller's memo: NASHDD16