How do hard drives work?

If I want a new hard drive can I transfer all my stuff? Is it easy to install, I think I saw a video were it just pops in and out?

Thank you.

I have a perfect one for you. I had installed 3 different size hard-drives on regular PS3 and PS3 Slim and really, it's very easy. If you have some additional questions, ask away. ;)

http://www.youtube.com/watch?v=AuyQPW3bDS0