Dell XPS/Dimension XPS Gen 3 - Manual (Page 19)

Hard Drive
1. If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this procedure.
2. Follow the procedures in " Before You Begin ."
Removing a Hard Drive
1. Press in on the top shroud tabs and tilt the shroud back.
2. Lift the shroud away from the hard drive.
3. Disconnect the power and hard-drive cables from the drive and from the system board.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently
cushion it.