I tried to purchase a new external hard drive to help me with add more storage to my old 2008 macbook pro. I couldn't find a solution until I came upon the ifixit site.
As soon as the package arrived, I started to transfer my existing files on my old 200 gig drive to my new 750 gig drive. It took about 4 hours. When all was ready, I installed my new 750 drive and then installed another 750 drive where my old cd rom was. Now my computer has 1.5 tb. It's working like a champ......
Very satisfied with the outcome and will be using this site as much as needed.