A storage slot for removably holding and aligning data storage cartridges of differing dimensions. Two bowed leaf springs are positioned within the storage slot, at two side walls and opposite from, respectively, two opposite side walls. The bowed leaf springs extend in a direction parallel to a direction of insertion and withdrawal of a data storage cartridge, and are fixed at the end closest to the opening. A bowed portion of each bowed leaf spring forms a ramp surface towards the opening and towards a corresponding opposite side wall. The bowed leaf springs are located a distance from the corresponding opposite side wall to form an interference fit with the smallest dimensioned data storage. The bowed leaf springs thus provide compression toward a data storage cartridge, to hold and align the data storage cartridge against the opposite side wall.