Dell D31M Owner's Manual page 48

Steps
1. Pull one side of the hard drive bracket to disengage the pins on the bracket from the slots on the drive.
2. Lift the hard drive out of the bracket.
NOTE: The orientation or the SATA connector marking on the hard drive so that you can replace it correctly.
Installing the 2.5-inch hard drive bracket
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the location of the 2.5-inch hard drive bracket and provides a visual representation of the
installation procedure.
48 Removing and installing Customer Replaceable Units (CRUs)