As explained earlier, I already own LaCie the 1Big HDD Dock. I haver bought the Thunderbolt 2 to 3 adaptor, fitted it and with a Thunderbolt 3 cable it works!
It is essential that I had a means to Backup data and photos from a Thunderbolt 2 access that could be later used with a Thunderbolt 3 resource.
The HDD mounts and has been reformatted to Mac OS Extended (Journaled). I now have 4TB of HDD storage to backup Documents and Photos in prep for my new Mac Mini M2 this Christmas. Time Machine (on a separate drive) cannot be used to migrate my old Intel Mac to a new M2 Mac.
The USB port does work. Memory Sticks/Flash drives all mount and are accessible. The SD Card Reader also works. As for the CF Card I don't know nor do I care.
Thank you for your interest and assistance.
I think I'm good to go now as all things are fixed.