Dell XPS 730 H2C (Late 2008) - Manual (Page 18)

4. Press the blue tabs on each side of the hard drive bracket toward each other and slide the drive up and out of the hard drive bay.
5. Prepare the new hard drive for installation and check the documentation for the hard drive to verify that the drive is configured for your computer.
3.5" hard drive:
Removal:
Replacement:
1 power cable 2 data cable
1 blue tabs (2) 2 hard drive
3 hard drive bay
NOTE: If a hard drive bracket is installed inside the hard drive bay, remove the bracket before you install a new hard drive.
NOTE: If the hard drive you are installing does not have the hard drive bracket attached, use your original hard drive bracket; snap the bracket
onto the new drive.