The WD ShareSpace 4-bay Gigabit Ethernet network attached storage system with a space-saving footprint and 4TB capacity gives you the benefits of a big-time data center without the need for a big-time IT department. Perfect for centralizing data on a small office or home network. Features include RAID 0/1/5, MioNet remote access software, an e-mail alert system, Active Directory support and a download manager. Push a button to quickly transfer data from a connected USB drive. Centralize your music collection and stream to a Mac or Windows PC with iTunes software. Set up continuous backup for up to 3 computers in your network using the included automatic backup software.