A data storage device includes a printed circuit board (PCB), a connection tab, a dummy tab and a guiding member. A memory chip is mounted on the PCB. The connection tab is formed on a first surface of the PCB to electrically connect the PCB with a first cable. The dummy tab is formed on the first surface of the PCB. The guiding member is formed on the dummy tab to guide an insertion direction of the first cable. Thus, the data storage device without a separate connector may be manufactured by a relatively simple process at a lower cost.