Network Attached Storage (NAS) is a type of storage device that is connected to a computer network and provides users with shared access to files and data. It is a dedicated file storage server that allows multiple users to access and share data over a network. NAS devices are typically used in small and medium-sized businesses, as well as in home networks, to provide a centralized storage solution for data that can be accessed by multiple users. NAS devices are typically connected to the network via Ethernet or Wi-Fi, and can be managed remotely. They are also often used to back up data, as they provide a secure and reliable way to store data.