The Buffalo 6TB LinkStation Quad Network Storage Model LS-Q6.0TL/R5 is a high-capacity external drive designed for network storage. With four bays supporting HDD drive types, this black storage device offers a spacious 6TB storage capacity. Its Ethernet interface allows for easy connection to a network, making it ideal for centralizing and sharing data in a home or office environment. As a product from Buffalo, a trusted brand in storage solutions, users can expect reliable performance and data management capabilities.

4x1.5TB HDD = 6TB total

Comes with ac adapter

Refer to pics.

Used. Note this LinkStation is no longer supported by Buffalo. Still works great. Not sure if there is a way to further upgrade this NAS since the latest code doesn’t support the newer SMB protocols.