An exemplary fixing apparatus is for mounting a hard disk drive (HDD) having a plurality of holes defined in sidewalls thereof. The fixing apparatus includes a first bracket, and a second bracket. The first bracket includes a side plate, and a transverse member perpendicular to the side plate. The second bracket includes a side plate, and a transverse member perpendicular to the side plate. A free end of the transverse member of the second bracket pivotably engages with the transverse member of the first bracket. A free end of the transverse member of the first bracket is detachably locked to the transverse member of the second bracket. The side plates of the first bracket and the second bracket include a plurality of fixing members attached thereto to engage in the holes of the disk drive, respectively.