Step 4Swap out the drive...
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Now this part is crucial. There are four screws holding the actual hard drive in the tray. From what I can tell, these screws are made out of butter. If you breathe on them while taking them out, they will strip. I know this...because I stripped one. Just take your time and make sure your screwdriver matches up closely with the screw head. If, like me, you happen to strip one, don't fret. With a small pair of needle nose pliers and a little patience, you can turn the screw out. However, just save yourself the hassle and try not to strip one.
Once all the screws are out, just slide the old drive out of the tray and slide the new one in. Don't forget to bolt it back together.