Hi, I am Dave, I will help you with this.
The calculation in Windows Storage settings will also account for the app data for each of the apps
Click the link below to download a small free utility named Treesize.
https://www.jam-software.com/treesize_free
Very Important - to run TreeSize, you must right click its icon and choose Run as Administrator.
Using that utility you will be able to see where all your drive space is being used
If you still have a problem, please provide a screenshot of your C drive in that TreeSize utility, so I can see your hard drive and work out where that space is being used and if there is an underlying problem.
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