Well I finally got it fixed. Thanks to all who provided suggestions. I opted for creating a home network and setting up a shared folder to migrate my files & settings from my ancient DELL to my new PC.
I first tried to set up a homegroup but you are restricted to PCs running W7. My old PC had XP/Home so that idea was knocked out of play. I didn't want to spend any more money on new/updated interfaces for my old PC since it is destined for the Grundon.
I had used it as a standalone PC so no network was installed. In fact to save space on my original 8Gb drive (1998 remember !) I deleted some optional Windows components to save disk space - including client file sharing services. No wonder it took me all day to figure out why I couldn't create a shared folder
The W7 migration tool created a .mig file of 9.6Gb. However the transfer size was 18.2Gb. It clearly transferred itself as part of the migration process and had to be later deleted.
I am disappointed that an easy task did not work with the easy transfer cable or with a simple usb flash drive. However I did learn or re-learn a lot during this exercise.
Happy Christmas to all. All is well.