A file is a collection of data stored on a computer or digital device that is identified by a unique name. Files can contain various types of content, such as text, images, videos, audio, and software programs. They are organized within a storage system and can be accessed, modified, and moved by the user or applications. Files are typically structured in a hierarchical file system, where they are stored in directories or folders for easy management and retrieval. Common types of files include documents, spreadsheets, executable programs, and multimedia files.