A disk drive assembly includes a disk drive and a drive bracket. The disk drive includes a sidewall. The sidewall includes a sidewall body, a first resilient tab extending from the sidewall body, and a second resilient tab extending from the sidewall body. A first securing opening and a second securing opening are defined in the drive bracket. The first securing opening engages the first resilient tab to prevent the disk drive from moving along a first direction. The second securing opening engages the second resilient tab to prevent the disk drive from moving along a second direction opposite to the first direction.