Network-attached storage (
NAS) is a file-level
computer data storage server connected to a
computer network providing data access to a
heterogeneous group of clients. NAS is specialized for
serving files either by its hardware, software, or configuration. It is often manufactured as a
computer appliance – a purpose-built specialized computer. NAS systems are networked appliances which contain one or more
storage drives, often arranged into logical, redundant storage containers or
RAID.