The correct answer is letter "B": backing up data for one computer on the network.
Explanation:
A Network Attached Storage device or NAS provides a large hard drive for a specific network. Besides, they provide data backup in case something happens to the original files. NAS drives are connected into a network implying any information stored in the network is accessible from any device connected in the same network. A big advantage of NAS is that it is not Operating System (<em>OS</em>) sensitive, meaning devices with different OS can access the files in the network.
