Dual OS HD memory issue

I have a memory problem that I cannot fix at this rate. Currently, there are two hard drives on my PC. One has 1tb with Win 10 and the other is 500gb with Fedora 29. When I commence analyser (DUA) on Fedora 29, there is only 40-50 GB of available space. I then boot to Windows, check whether all hard drives are formatted properly, and get back to Fedora 29. Same thing happened when I reinstalled DUA. How can I free up my space that should have been there to begin with?

Hello Leigh
Can you tell me how you did you divide partition in windows and fedora?
So that i can tell u how u can free the space
and are you using dual boot in system?

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