A mounting apparatus for mounting a data storage device with a sliding member attached thereon, includes a bracket and a latch member slidably mounted on the side plate. The bracket includes a side plate. The side plate defines a slideway for slidably receiving the sliding member of the data storage device. The latch member includes a resilient tab. The latch member is slidable on the side plate between a first position wherein the resilient tab is located at a halfway of the slideway so as to block the sliding member from passing therethrough, and a second position wherein the resilient tab is located outside the slideway so as to allow the sliding member to pass therethrough.