This is my first macbook (pro 13.3) and my first attempt at Imovie. I have a Panasonic HD video camera that can record onto the internal storage or I have a SD card that it records onto. When i sync the camera to my Mac and open it in IMovie, it works great. I am trying to move the original video from my camera to my western digital external hard drive. I hook both devices up and start the copy and past transfer. It moves the files over, but when I go back to open those files they wont open. What am I doing wrong? Is this a matter of changing over formats? If anyone can help me out that would be great. Thanks!!