Where is the 4GB memory unit located inside an xbox 360?

My xbox 360 slim gave me a red ring but I don't believe that means the 4GB internal memory is damaged. I have another xbox 360 slim and I'm planning on swapping the internal memory units so that I can get some fallout and minecraft saves I lost that I've worked on for years. All help is appreciated

If you can't recognize it when you see it, then you have no business cracking the case.

The internal memory is not swappable. It's integrated into the system board.