You are terrific!! Thanks so much for going to the effort of pre-testing your advice to me, and also for creating the special ".bat" app and then posting it to Google Drive. I can't thank you enough for your kindness and thoughtfulness.
It is getting late here on the US east coast, but I will be sure to try your solution sometime this weekend and then get back to you on how all went with the backup/restore from external drive.
Many thanks, again!