I have over 50 Hi8 family videos sitting in a box that I will soon be running through my Sony TRV-480 which outputs the analog tape to digital. I will be using iMovie to edit and probably add music to. 1. I read about a scratch disc? What is a scratch disc? 2. Where do I store this raw unedited video from each tape. I am guessing an hour tape will have a huge file size. 3. Do I save the video uncut just in case my kids someday want to see it at some point down the road? Where do you save these files and will they last a life time on DVD's.. Better off keeping them on an external drive? 4. I think its going to be hard to edit some of this stuff down but I know watching your kid eat baby food for longer than 60 seconds is painful for most. Thanks for your help.