How Do I Get Pictures That Are On My Camera But Not On My Memory Card Onto A Memory Card?

Depending on the camera options, you can do it on the camera without connecting it to a computer. If that option doesn't exist, you will have to transfer the pictures to the computer, then back onto the computer. You may have to remove the memory card and connect the camera to the computer in order to access those images not on the memory stick.

When you have the images on your computer, insert the memory card and transfer them on the card through the camera.