Orinally there were two partitions, one of 300 gb the other one had about 3.5 tb
I was tryng to install windows 10, but I couldn't, because all my partitions showed the
"Windows cannot be installed to this disk. The selected disk is of the GPT partition style" legend
So I tried doing the DISKPART CLEAN solution there is outhere, I like fool I deleted the other partition the larger one where I had all my files
Here's some pics



I also ran minitool partition wizard with no succes
Thanks