I uploaded a bunch of home videos to my iMovie library a while back, not realizing that it would increase the size of my video library from 40GB to 140GB. I don't have much room left on my laptop and would like to delete some files. Since I have the original movie files saved on an external drive, I'm thinking about deleting the iMovie events that I created when I uploaded the videos to iMovie, but I'm worried that this means I will lose all of the iMovie projects I created. What will happen to my iMovie projects when I delete the source files? Is there any way to preserve them without keeping 140GB of video saved to my laptop? Thanks in advance for your help!