Abstract: A hard disk drive mounting bracket allows for attaching multiple hard disk drives to a chassis and uses pre-existing chassis hardware, resulting in more efficient user of chassis space. A hard disk drive mounting bracket includes a base sheet. The base sheet includes a front region, a rear region, and a pair of side regions. The hard disk drive mounting bracket also includes a pair of support flanges disposed opposite one another in the side regions of the base sheet. The support flanges defining a receiving space that receives a plurality of hard disk drives. Each support flange includes a first end and a second end. Each first end and second end includes a mounting aperture.