Many small businesses and advanced home users will use some form of external storage device to backup data or store common files across a network. One of the most convenient methods of doing this is to use a NAS (Network Attached Storage) device, which allows you to access network shares from all other PCs connected to the same network. The QNAP TS-209 Pro II provides space for two SATA hard drives, providing ample storage capacity (for example, 2 x 1TB drives). However this NAS unit isn’t quite as simple as just providing access to storage space, it can do a whole lot more.