Well it was a no go on the restoring of any of my files from the backup. It obviously has not worked properly, as although they appear to be there, they have no content!
So all is lost and it's an awful lot to try to contemplate and remember to even start rebuilding. Plus I have lost more than 500 photographs that cannot be replaced - very frustrating and upsetting.
I just bought an 8GB flash drive from Amazon, it might be after the horse has bolted, but I'm not getting caught out again.