If the new drive is an addition to the existing one, leave the old drive in place and screw the new drive into an empty spot in the drive cage. Then use the SATA cable that came with your new drive to connect the drive to the motherboard's SATA port, according to the motherboard's instructions. Finally, attach an appropriate hard drive power connector from your power supply to the drive.

Once you have connected your new hard drive to your motherboard and power supply, boot up the PC to confirm that the system BIOS recognizes the new drive. If it doesn't, recheck your connections and consult the drive and motherboard manuals. As soon as the system BIOS recognizes everything, close up the case and configure your drive using the advice on the first page of this story.