A rotary filing device wherein mounting strips adapted to receive a container for an item or items to be stored are linked together in an endless chain and supported at each end in common recesses in a frame such that the chain is movable by tilting successive strips to provide access to each container in turn. The frame carries projections which are adapted to interlock with projections on an identical element or on a mounting bracket whereby a plurality of devices can be secured together and/or to a support. When the container is a tape cassette library case, the mounting strip may additionally be adapted to both the cassette case and the cassette itself, as desired. A spring loaded catch fitted in the recess to bear upon the ends of the mounting strips received therein, enables positive indexing and automatic resumption of a tidy equilibrium position, irrespective of the orientation of the device, in use.