Network Attached Storage (NAS) is a dedicated file storage device that connects to a network, allowing multiple users and devices to access and share data. It functions like a centralized hub for storing files, making it easy to back up important information and access it from various devices, such as computers, tablets, and smartphones. NAS systems often come with their own operating system and can support various applications, including media streaming and file synchronization. They are popular in both home and business environments for their ability to provide secure, scalable, and efficient data management solutions.