The present invention is a USB memory device comprising a chip-on-board (COB) package having a flash memory and a flash memory controller embedded within, a COB carrier for storing the COB package comprising a tray having a G-shaped block with a pair of side lock bumps, and a metal housing for inserting the COB carrier having a top surface, a bottom surface, a top rectangular cut out, a bottom rectangular cut out, a pair of ends, a pair of side cut outs, a pair of top rectangular openings and a pair of bottom rectangular openings. The COB package, the COB carrier and the metal housing are used to assemble the device by inserting the COB carrier from either of the pair of ends and sliding the COB carrier within the metal housing until the pair of side lock bumps interlocks with the pair of side cut outs.