1) clips. Every unique clip/quicktime adds weight. I found this out when we started on some P2 projects where thousands of unique clips were being generated. Not much you can do about this… break up projects into sets of dailies and open them all
2) cuts. keeping a backlog of every single roughcut adds up fast. When you’re moving along and know you won’t need cuts 1-25 b, rev a, version 4, agency preferred…. save an increment of your project and delete all those old cuts.