Well, it seems to work fine now - just as before, as one might expect. I shall take some time away from it (it's only destined for backup, after all). When I revisit it I shall first make an effort to review what I want to keep - probably less than one might think, I expect - and what I shall need for the backup function for two or three other computers in the house. Then I shall develop a plan,,,,,
Thank you all, yet one more time!