A file server is a dedicated computer or device that stores and manages files for multiple users on a network. It allows users to access, share, and collaborate on documents and data from different devices, such as computers and smartphones. File servers help centralize data storage, making it easier to back up and secure important information. These servers typically run on operating systems like Windows Server or Linux and can be configured to control user permissions, ensuring that only authorized individuals can access certain files. By using a file server, organizations can improve efficiency and streamline workflows among employees.