But then what happens when I want to copy my presentation, some associated video clips, my notes, the directions to the venue and the meeting agenda onto my USB

But then what happens when I want to copy my presentation, some associated video clips, my notes, the directions to the venue and the meeting agenda onto my USB drive? Suddenly all of the information relating to my presentation is scattered across multiple locations, which just gives me exactly the opposite problem to the one created by the file/folder heirarchy (i.e. now my data is grouped by type (e.g. in my photo library) instead of by subject (e.g. in a folder).