I've been doing some video editing on my Macbook Pro recently. I've imported footage from an SD card to both iPhoto and iMovie, plus exported some into my documents. My hard drive is filling up, so I decided to delete all old footage and start using an external drive. I've deleted all the video footage from iPhoto, deleted the events in iMovie, deleted all the loose files and emptied the trash. However, in About This Mac > Storage, I'm still seeing about 50 GB of "Movies" on my drive. I don't have any video except the footage I've imported. Where is it hiding, and how do I free up that space? Thank you.