Your C: Drive Is Full: Where the Space Actually Went
Storage Sense freed a few gigabytes and the drive is still full. Here is what is holding the rest, and which of it Windows will hand back on its own.
how-to
2 articles.
What "System Data" on a Mac Actually Is
macOS reports a large opaque "System Data" category and offers no way to open it. Here is what is inside, and which parts are safe to clear.
