How to Upgrade or repair your PS3 

How To Upgrade Your PS3 Hard Drive

Optimizing Your PS3 for Bluray



How to upgrade your PlayStation 3 Hard Drive

This is a great site that walks you through how to change your hard drive on your PS3 system. Some systems seem to run into problems as the memory fills up, replacing the hard drive can resolve the issue. You may also want to simply upgrade to more memory:

http://www.cnet.com.au/how-to-upgrade-your-playstation-3-hard-drive-339282375.htm

Here is a link to a video showing you exactly the steps to go through. This video was created by c/net and indicates that it will not void your warranty (the hard drive is located under an access panel). This video also shows how to back up the system first so that everything is saved:
http://www.youtube.com/watch?v=AuyQPW3bDS0