A mounting apparatus for mounting a data storage device, the mounting apparatus includes a bracket and a holder. The bracket includes a bottom plate, and a first side plate extending from one side of the bottom plate. A protrusion protrudes from the bottom plate. A blocking member is formed from the side plate. The holder includes a first sidewall configured for mounting the data storage device thereto, and a latching plate extending from the first sidewall. An engaging portion is formed from the sidewall and capably of engaging with the blocking member of the side plate of the bracket. A latch portion is formed from the latching plate and capably of sliding over to engage with the protrusion of the bottom plate of the bracket.