Forum Discussion
Xanksipko
Sep 09, 2025Iron Contributor
Why is my C drive suddenly full but I have nothing on it?
I just noticed that my C drive is almost completely full (disk storage at 100%) all of a sudden, even though I haven't installed any big programs or downloaded large files recently. This is causing m...
ElliottHayes
Sep 09, 2025Iron Contributor
Why C drive suddenly full for windows 10? Your C drive may be full due to system files, updates, restore points, or hidden cache files. Using built-in tools like Disk Cleanup and Storage Settings will often resolve this. If the problem persists, identifying large files with specialized tools can help you free up space.
What to do if C drive suddenly full for windows 10?
1. Run Disk Cleanup
- Type Disk Cleanup in the Start menu and run it.
- Select your C drive.
- Check options like Temporary files, System cache, Old Windows Update Files, etc.
- Click Clean up system files for more options, including removing old restore points and Windows update files.
2. Check Storage Usage with Storage Settings
- Go to Settings > System > Storage.
- Click on C: drive to see a breakdown of what's taking up space.
- Use this info to identify large categories like temporary files, system files, or apps.