A mounting apparatus is used to secure a data storage device (10). The data storage device has a mounting member (12) disposed thereon. The mounting apparatus includes a bracket (30) for accommodating the data storage device, and a latch member (50) removably attached to the bracket. The bracket includes a side plate (32), which defines a through opening therein, for receiving the mounting member of the data storage device along a first direction. A guideway (327) is disposed on the side plate. The guideway extends in a second direction perpendicular to the first direction. After the mounting member of the data storage device is received into through opening of the bracket, the latch member is inserted into the guideway, thereby preventing the mounting member from disengaging from the through opening.