It's impossible to copy videos from a CF Express card to an SD card using "Image Copy". I didn't have any problem in R5, but I think the new foldering system in R5 M II causes this problem.
But why? It was very useful when I was in the field and didn't have my laptop. I could back up large, high-quality videos on the slower SD cards. R5 Mark II is supposed to be better than the old R5, but this is a downgrade. Should I ask for a feature...