Dell OptiPlex GX280 - Manual (Page 335)

Removing a Hard Drive
1. Follow the procedures in " Before You Begin ."
2. Disconnect the power and hard-drive cables from the drive. Disconnect the hard-drive cable from the system board.
1 hard-drive cable
2 hard-drive cable on system board
3 power cable
3. Press in on the blue tabs on each side of the drive and slide the drive up and out of the computer.