an upper case;

a lower case;

a printed-circuit board assembly (PCBA) that comprises:

a circuit board having wiring traces;

a flash-memory chips mounted to a first surface of the circuit board;

a controller chip mounted to the first surface of the circuit board, the controller chip having an input/output interface circuit for interfacing to an external computer, and a processing unit for accessing the flash-memory chip in response to commands from the external computer received by the input/output interface circuit; and

contact pads formed on a second surface of the circuit board, the contact pads for connecting the controller chip to the external computer;

wherein the second surface is opposite the first surface;

wherein the upper case is attached to the lower case during assembly with the PCBA between the upper case and the lower case, with the contact pads exposed through contact-pad openings between the upper case and the lower case, the upper and lower cases encapsulating the circuit board,

wherein the flash-memory chip is block-addressable and not randomly-addressable;

wherein the upper case has an upper exterior surface that is a largest external surface on the upper case;

wherein the lower case has a lower exterior surface that is a largest external surface on the lower case;

wherein the upper exterior surface is substantially parallel to the lower external surface;

wherein the first surface and the second surface of the circuit board are parallel to each other, but are not parallel to the upper exterior surface or to the lower exterior surface;

wherein the circuit board is mounted within the upper case and lower case at a slanting angle.