Quick answer: A large Users folder usually means personal files, AppData, browser profiles, OneDrive, or app caches are using space.
Why this uses C drive space
The Users folder contains personal files and app data. It is often the real reason C is full, but it requires careful review.
Safe cleanup steps
- Check each user account if the PC has multiple users.
- Sort Downloads, Desktop, Videos, and Pictures by size.
- Review AppData only at the app-folder level.
- Check OneDrive local files.
- Move personal media to another drive.
What to avoid
Do not delete another user's profile or AppData folder unless you have backed up data and removed the account properly.
How DiskTidy helps
DiskTidy can help you review temporary files, browser cache, cleanup candidates, and large files before deleting anything. It is designed for local, review-first cleanup instead of blind one-click deletion.