A mounting apparatus is provided to readily fix a data storage device defining at least one hole in place. The mounting apparatus includes a bracket holding the storage device, a securing plate, and a pole coupled to the securing plate. The bracket defines at least one through hole corresponding to the hole of the storage device, and a positioning plate defining a sliding groove extends perpendicularly from the bracket. At least one post extends from the securing plate, and engages in the corresponding hole of the storage device to fasten the storage device. One end of the pole is pivotably mounted on the bracket, and the other end of the pole extends though the sliding groove of the positioning plate, and is slidable in the sliding groove to control the post of the securing plate to engage or disengage the hole of the storage device.