A mounting apparatus for a data storage device that includes a tab includes a bracket, a locking member, and an operating assembly. The bracket includes a bezel defining an opening and a first cutout corresponding to the tab. The locking member, movable on the bezel, defines a second cutout corresponding to the first cutout. The operating assembly is assembled in the bezel and slides the locking member on the bezel to align or misalign the second cutout with the first cutout.