I have a quicktime video file, 1.37 GB that I was planning to split in half into 2 files that would be a little less than 700 megabytes each- a perfect size to use on two CD's. I did it this way: I duplicated the file. For one copy I selected the first half of the movie and deleted it, then I deleted the second half of the other file. So I have the first and second half of the video, separate. The only problem is that now BOTH files are 1.37 GB. I assumed they would shrink in size... why did this happen?