Hi Robert, Windows Explorer is useless when it comes to working out where your hard drive space is being used . . .
Click the link below to download a small free utility called Treesize. Using that tool, you will instantly see where this space is being used
https://www.jam-software.com/treesize_free/
Once you have worked out where this space is being used, please let me know so I can advise on what is safe to remove and indeed what the underlying problem is . . .
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