Hello everyone, I'm fairly new to Mac, I bought my first on back in November. I have a previous generation MacBook Pro. I bought it for doing video editing on the road. I just moved to NYC so I needed something light to carry around with me yet still have power to do editing. I'm fairly happy with my purchase. I bought a previous generation MacBook because I didn't see much benefit to buying the newest one and I got a great deal on it because I got it from Apple Clearance and also a student discount. The only problem was that you cannot customize items on clearance, they are the lowest models ready to ship. No problem I thought to myself, I'll just upgrade it when I get it. So I bumped the ram up to 4 gigs and everything seemed fine. Now, I'm editing High Def footage and I'm beginning to notice a slow down. Everything I edit is on external hard drives that are 7200 RPM drives. My 1 TB drive is using USB 2.0 and my 500 gig is using firewire. I'm still getting slow down and I'm wondering if my internal Mac Harddrive has anything to do with it. It is 5400 RPM. While the footage I'm editing isn't on the Mac, the programs I edit with are installed on the 5400 RPM drive. I bought a internal 7200 RPM drive to replace it with, I'm just seeing if there is any point in doing it? Will I notice a difference in performance? Please advise! P.S. Another thing that may be the problem is I'm editing on Adobe Premiere Pro CS4 which lately seems unstable. This might be causing my slow performance with editing high def footage. My job has recently gotten a copy of Final Cut Studio 2 which I've installed. I just haven't had much time to play around on it yet to learn how to use it. I know importing footage from a P2 card is different than how you do it on Premiere and have yet to figure that out.