Hi and thanks for your response.
Yes, all the files are known to MB - the MB library references them.
Yes, I can attach the mobile sd card so they can all be available at the same time.
I had seen elsewhere that there needed to be a wired sync prior to WiFi.
So, my assumption was that I should attach the mobile sd card and sync to that first - that would place all the files there.
Then later use wifi for future incremental sync operations.