Dell OptiPlex 3000 Tower Service Manual page 23

Steps
1. Remove the two (M3x3.5) screws that secure the primary 2.5-inch hard drive to the hard drive bracket.
2. Lift to remove the primary 2.5-inch hard drive from the hard drive bracket.
3. Remove the two (M3x3.5) screws that secure the secondary 2.5-inch hard drive to the hard drive bracket.
4. Lift to remove the secondary 2.5-inch hard drive from the hard drive bracket.
5. Pull one side of the hard drive bracket to disengage the pins on the bracket from the slots on the drive.
6. Lift the hard drive out of the bracket.
Removing and installing components 23