A fixing apparatus for fixing a data storage device with a plurality of mounting holes defined in sidewalls thereof includes a first bracket, a second bracket, and a latch member. The first bracket includes a side sheet and a base sheet perpendicularly connected thereto. The second bracket includes a side sheet, and a base sheet perpendicularly connected thereto. The base sheet of the second bracket is pivotally attached to the base sheet of the first bracket. The latch member is slidably attached to the base sheet of the first bracket and engages with the base sheet of the second bracket. A plurality of fixing pins extends from the side sheets of the first bracket and the second bracket, corresponding to the mounting holes of the data storage device.