Yes, sorry my bad, you are completely right, this is a new build, and a new 2Tb HDD.
That's correct, there's nothing at all in D and E, and I don't have precious data on my HDD yet so that's why I plan on doing this operation before I download or install more things
This is how I planned on doing things: Delete D and E to get adjacent Unallocated Space near C, extend C by small amounts till it displays 300Gb on Windows, Create D, Adjust it to get 700Gb on Windows, Create E with all what is left.
Does it sound safe and doable ?
If something goes wrong what are my options to get things work again ?
Thanks a lot for replying.