Installing a new hard drive is one of the most common ways to upgrade a computer, according to Microsoft. Before you can add a new drive, you need to remove the old one if you have no available space or if the drive is bad. Prior to removing the drive, back up any important data stored on it if it’s functional. If you are selling or giving the hard drive to someone else, erase any data on the disk by formatting it.
6 Always store a functional hard drive in an antistatic bag when not in use. If possible, also enclose it in a layer of bubble wrap while in storage. Be careful of the motherboard and other components when removing the drive. Hard drives are very sensitive to cold, heat and jarring. Be careful not to hit, bump or drop the hard drive when removing it.
Locate the hard drive. Hard drives are often housed in removable metal cages that are secured to the computer case with one or more screws. They are connected to a power cable and a serial ATA cable. Refer to your user's manual to locate the hard drive if necessary.