Chas, you have got it exactly! I wondered why the first transfer screen, where you appear to be able to select the CT-S1000V, then went to a ‘Save’ screen that showed the iPad and iCloud drives. I thought it was saving a copy there as well. My iCloud drive was open with a long list of folders, so the CT-S1000V drive was off the screen. Now I have scrolled down and selected it, it works perfectly.
Excellent. I am supposed to understand this stuff, but that needs sorting out by Casio. They also need to make the app a proper iPad app that works in portrait or landscape.