What’s the strangest thing quietly consuming space on your Windows PC?

WinReclaim started after I discovered that the obvious culprit was not actually responsible for most of my missing disk space. The real usage was scattered across development caches, generated build output, Android tooling, containers, temporary data and local model stores.

I’m curious what other Windows users have found hiding on their drives.

What was consuming far more space than expected, and what information would have made you confident enough to remove it?