Hi. I'm David, and I'm happy to help you.
See if you can download and install the free version of the TreeSize app. This app will help identify which folders are using up space.
https://www.jam-software.com/treesize_free
Then right-click the application shortcut, select "Run as administrator", select the drive to be scanned, and wait for the scan to finish.
Share a screenshot of the TreeSize scan result. Use the shortcut "Windows + Shift + S" to use the screenshot tool.
Looking forward to your reply.
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