I want to upgrade my ps3 hard drive. I have an hard drive and would like to have some more space. What kind of hard drive would I have to buy? Is the ps3 hard drive different from a regular SATA hard drive found in the computers? If not what is the difference? And what to look for in a hard drive especially for ps3. What things do I keep in mind? What are the different capacities of these hard drives? Where can I get one?