This model supports USB 3.1 (compatible with USB 3.0). I purchased it 5 years ago, and I confirmed its basic operation by connecting it to a PC, and it worked without any problems. - Completely formatted (not quick format) - Includes USB cable and AC adapter - No box or manual (only the main unit and cable) - Ready to use immediately after connecting to a PC ※ The capacity displayed is according to the manufacturer's specifications, so it will show approximately 3.6TB on a PC. Although it is a used item, there are no noticeable scratches. HDDs are consumables, so please purchase only if you understand that this is a used item.