Dell OptiPlex Gxi - Manual (Page 111)

1. Remove the hard-disk drive bracket.
2. Remove the four screws that attach the hard-disk drive to the hard-disk drive bracket.
One hard-disk drive attaches to the hard-disk drive bracket at the sides of the drive. The other hard-disk drive attaches to the hard-disk drive bracket at the bottom of the hard-disk
drive.
3. Slide the drive out of the hard-disk drive bracket.