Ok, no one got this?
Well, after many days of stress and waiting for deliveries, I have resolved this now.
If anyone is interested I had to buy another drive that could hold and store all of my data on the 1TB drive, plug it into the existing drive and copy everything across.
While I was checking the drive, for some as yet unknown reason all my data was sudenly there!
Myonly cunclusion is that I used a idfferent pc to access both drives, but also a different account setup.
Apart from that, it's all fixed now. phew!