A copy of your MXFs you can back to in case something happens Romulus current drive/system. It's a good idea to keep a copy on hand. I dint wrap to QuickTime, but rather use native MXF files. I have no less than 3 copies with a forth that I edit from of any shoot masters.
Thanks Jeremy, I keep two QT copies plus MXF while I'm working on a project,
after that everything depends on the fact whether I might be coming back to that
future project or not.
If not, I only keep QT files.