An exemplary fixing apparatus is for mounting a hard disk drive (HDD) having a plurality of holes defined in sidewalls and includes a bracket, a clip, and a plurality of fixing pins. The bracket includes an end plate, and a pair of side plates extending from opposite ends of the end plate respectively. The side plates are capable of being flexed away from each other for allowing the HDD to be placed therebetween. The clip is pivotably attached to one side plate and detachably locked with the other side plate. The fixing pins are attached to the side plates to engage in the holes of the HDD.