Do you use editing programs like Photoshop? If its running in the background it’s likely creating temporary files in your drive. You can change the directory it uses in settings, too, if you want to have more space. Even if you’re not using that kind of apps, you can still go to the windows search bar and type “%temp%”. You can delete everything from that folder without much worry as your computer has a backup of these files and can generate them again anytime. I’m not much of a tech guy myself but I know that much. Correct me if I’m wrong tho!!