The Ethernet Disk RAID comes with Gigabit Ethernet interface plus robust data protection, four hot-swappable drives, and RAID 0, 1, 5, 5+spare, and 10 support. This essential network storage solution meets small business needs perfectly as a file-sharing server and central backup storage for multiple PCs. As a DHCP server with a second Ethernet port, it enables you to create your own local Gigabit network. User and group level authentication allows for securing data shares. With two USB 2.0 expansion ports, you can easily attach extra storage for expanding available capacity.