(computer science) a digital computer that provides workstations on a network with controlled access to shared resources WordNet 3.0 & Open English WordNet

In computing, a file server is a computer attached to a network that provides a location for shared disk access, i.e. storage of computer files that can be accessed by the workstations that are able to reach the computer that shares the access through a computer network. Wikipedia

A form of disk storage Wikipedia Disambiguation

A server used to share files with other computers. Wiktionary