A device for storing data carriers has a housing (10). In the housing (10) magazines (12) can be inserted, which accommodate data carriers, e.g. magnetic tape cartridges (26) lying flat. In order to be able to exchange cartridges (26) without moving the magazine (12) out of the housing (10) and without interrupting the operation of the device, end-sided receptacles of the magazines (12) are designed as a changing device (28), which is mounted as a drawer in the associated magazine (12) and which, in the case of the inserted magazine (12), can be extended out of this magazine (12) and out of the housing (10).