Sorry to have left you hanging. On Sunday avo a lightning strike next to the house took out my internet. Tech came today; I was very lucky as there was no damage to the underground fibre optic cable, I only needed a replacement NBN box and pleasantly surprised it was free. I had nada, even resurrected an old tv so I had some entertainment.
All the files you posted are N/A for us, all to do with windows install.
You made good progress. Possible the SSD/caddy was recognised because the BIOS registered it at Boot.
So I take it the files you wanted to save are now on the new internal SSD and accessible?
Are you OK doing some exploring/work in the BIOS/UEFI?