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Network Attached Storage (NAS) refers to dedicated file-level computer data storage servers connected to a computer network that provide 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 device optimized for a particular use case and sometimes integrated with other functions of a general-purpose computer. NAS devices are networked appliances which contain one or more hard drives, often arranged into logical, redundant storage containers or RAID arrays. Network Attached Storage removes the responsibility of file serving from other servers on the network allowing them to focus on their primary function. They typically provide access to files using network file sharing protocols such as NFS, SMB/CIFS, or AFP. NAS is commonly used for home networks, for media streaming and data backup, and in businesses for file serving, data storage, and data protection. It can be accessed remotely over the internet making it a convenient solution for sharing and accessing files from anywhere. NAS devices are typically connected to the network with Ethernet cables but some also support WiFi connectivity. They come in various form factors including desktop, rack-mount, and even USB drives that can be turned into a NAS device when connected to a network router with built-in USB ports. In summary, Network Attached Storage is a specialized type of computer data storage that is optimized for serving files over a network to multiple clients. It provides an efficient and convenient solution for file sharing, media streaming, data backup, and remote access.