Dell GX280DT - GX280 Desktop Computer User Manual page 209

1 power cable
2 hard-drive cable
2. Press in on the tabs on each side of the drive and slide the drive toward the I/O panel and remove it from the computer.
Installing a Hard Drive
1. Unpack the replacement hard drive, and prepare it for installation.
2. If your replacement hard drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure
each rail to the drive. Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and
then inserting and tightening all four screws (two screws on each rail).
1 drive
2 bracket rails (2)
3 screws (4)
3. Gently slide the drive into place until you hear a click or feel the drive securely installed.