NAS is an acronym for Network Attached Server. A NAS drive is essentially a hard disk drive with a built in network interface. As the term indicates, NAS drives are used for data storage. You can share music, photos, movies and your data with anyone on the network. A NAS drive is directly connected to a network through a router.
NAS drives are a practical file storage solution because data is kept at a single location and is made available to all clients on the network. The clients on the network can be computers running Windows, Linux or Mac OS, or they can be devices like a printer. NAS drives are being used by large corporations and home networks alike, to store, share and make back-up copies of data..