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Network Attached Storage (NAS) refers to a specialized file-level computer data storage server connected to a computer network that provides data access to a heterogeneous group of clients. It's essentially a dedicated, standalone server specifically designed for storing and sharing files over a network. NAS devices are typically connected to the network via Ethernet, and they can be accessed by multiple users simultaneously, making them ideal for small businesses, home offices, or any scenario where multiple users need access to shared files. They come in various form factors, from compact desktop units to rack-mountable models, and offer a range of features such as redundant storage options, remote access capabilities, and built-in media servers. In essence, NAS devices provide centralized storage solutions that are both flexible and scalable, allowing users to easily expand their storage capacity as needed.