Thank you for viewing. This is a network hard disk used since November 2022. I mainly used it for data backup, so I don't think it was powered on for very long. Operation has been confirmed on Win11 & Win10. This product is not an HDD that is connected directly 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 in the comments, "What are IP addresses and subnet masks?" but I cannot teach you that. I have thoroughly tested its operation before listing it. (It was used 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 item has some minor scratches and traces of tape used for identification with a label maker. There are no functional problems. If you agree with 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: NASHDD18