I have created an imovie project that is 10 minutes long and is 134GB - I am using up a whole external hardrive just to store it. Another project I have completed recently is also about 10 minutes long, and is 36GB. Is this normal? (Surely not?) Both projects (and especially the first one) consist of quite a lot of short clips...I can only suspect that each clip must somehow be retaining information from its entire source footage- could that be the problem, and if so how is that happening? And if not, what is happening? And how do I stop it from happening? I need to free up some space on my mac and I can't bin these projects or compress them because they are documentation for a theatre project that I have been working on for ages and I need them to be full quality... Please help!!!