The enclosure is an I-O DATA LANDISK HDL2-AA2W, with the HDDs replaced with two Western Digital 2TB drives, totaling 4TB. Therefore, it is equivalent to an HDL2-AA4W. This is a used item that has been initialized and confirmed to be in normal working condition. The exterior has no cracks or other damage, but there are fine scratches overall (see photos). If there are any problems such as non-operation or discrepancies from the description, please contact us within 5 days of arrival. We will provide a refund. Please ask if you have any questions. *Please refrain from price negotiations. ■Included Items Main unit AC adapter (non-genuine 12V 3A) ■Shipping Method Yu-Pack 60 size *Shipping will only be on weekdays. ■Product Information https://www.iodata.jp/product/nas/personal/hdl2-aa/ ■Management Number A909-136