This B&H Kit includes the QNAP TS-469U-SP 4-Bay NAS Server and four 3TB SATA Internal Hard Drives. The NAS server combines with four internal hard drives to provide 12TB of storage space. This server makes it easy to backup and store a large amount of data directly to the four included hard drives. The two integrated Gigabit Ethernet ports make it simple to connect your server up to your local network. You can also connect a variety of peripherals to the drive via the eSATA and USB ports.The included hard drives boast a 5400 rpm spindle speed, 32MB buffer and a fast SATA 6 Gbps interface, allowing you to quickly access your data through the server. The server supports secure-platform file sharing for Windows, Mac, Linux and UNIX computers.