Troubleshooting & messages · Moving, offloading and restoring apps
Why was an app folder left alone because it held sign-ins rather than cached files?
Short answer: The folder turned out to hold sign-ins, not just rebuildable cache, so clearing it would sign you out. Storage Studio never touches sign-ins or settings in a clean-up.
Storage Studio only clears or moves an app's cache — files it can rebuild. When a folder that looked like a cache turned out to also hold sign-ins (sessions, cookies or account settings), clearing it would sign you out or reset the app. So it was left alone.
That's deliberate: your sign-ins and settings are never touched by a clean-up.