I want external disks A and B to have exactly the same contents - but I don't want to sit there for hours answering 'Do this for the next 50 conflicts.' What's the best way to do it?

A file comparison program wouldn't help because the disks contain movies in folders by category, I'd have to copy the differences one by one manually.

I have Vice Versa so maybe I could setup some sort of backup profile A to B, then B to A?

Thanks - rev