Abstract: A cellular telephone includes a multimedia card (MMC) having storage capacity for computer data files. An engagement device for a data transfer interface (e.g., a universal serial bus (USB) interface) is permanently mounted to the housing of the cellular telephone. The engagement device is movable from a nonobstructing home position to an extended position to allow a user to plug the cellular telephone directly into a computer or other data processing system without requiring addition cables or connectors. The MMC is configured and controlled by a microcontroller or other control device to emulate a solid-state drive such that a user has the full capabilities of a solid-state drive and a cellular telephone in a single convenient housing.