A server for providing media files for download by a user with an operating system in which the user is created, a media table stored in a memory, in which at least a first media ID is assigned to a first media file and a second media ID is assigned to a second media file, an identification table stored in a memory, in which an identifier that can be assigned to an identification carrier is stored and assigned to the user, and an assignment table stored in a memory, wherein the first media ID and/or the second media ID can be assigned, in the allocation table, to the identifier and the first media ID is not assigned to the identifier, with a program routine provided on the server, with which the user changes the allocation table and assigns the first media ID to the identifier in the allocation table.