Hmmm, maybe I've got the name of the process incorrect.... I think you call it a Windows 10 Image Backup which saves your
complete config after all the time you spend setting up and personalising Windows.
The procedure told me to plug in a USB drive of more that 16Gb (which I did - my 64Gb pen drive) then asked me to confirm that the
process was okay to completely reformat that drive before the action backup process place - which I did.
At that point both the Pen Drive AND the 5Tb Backup drive were plugged in and the Drive Letters in File explorer was something like G: and H:
Getting these muddled, it was the 5Tb drive that was reformatted and then the Windows 10 Image Backup was made and copied to that drive.
It was a painful mistake to make!
So my question does not concern the backup process or which type of backup I did, but
whether my 5Tb drive can yield the lost files by some special process?
I have heard somewhere that when files are deleted (maybe also through the reformat process) that the files
are actually still on the drive but are no longer indexed in a way that the computer knows where they are.
Many thanks for your responses so far, they are all very helpful.