Thanks for all the replies but based on the replies and also the fact that I have no time critical need for this backup, I think it's best for me to exit this discussion for now until I get around to taking the time to explore this further myself. I'm not likely to be doing that very soon, so there's no good reason to keep this going for now. At a later date I may have more questions based on what I've tried or an update about a solution.
I very much appreciate all the replies. Kind regards.