The drive is full but you cannot see what is using it
Windows says my disk is full but my files are small. Where did the space go?
Written by The CommonFixes team · fact checked by CommonFixes review desk
Last updated
Short answer
Hidden space goes to Windows update leftovers, hibernation, system restore points, and the temp folder, none of which show in Explorer by default. The quickest thing to try first: run storage sense cleanup — Settings, System, Storage, then Temporary files. Tick Windows Update Cleanup, Delivery Optimisation files and Recycle Bin, then Remove files. This often frees many gigabytes. Most people are done in about 15 minutes.
Full walkthrough below: 4 steps for Windows, rated medium.
Sounds like this
- •Red bar on the C drive
- •Only a few GB free after deleting things
- •Cannot install updates
Why it happens
Hidden space goes to Windows update leftovers, hibernation, system restore points, and the temp folder, none of which show in Explorer by default.
Work through these in order
0% done- 1
Run Storage sense cleanup
Settings, System, Storage, then Temporary files. Tick Windows Update Cleanup, Delivery Optimisation files and Recycle Bin, then Remove files. This often frees many gigabytes.
- 2
Trim system restore points
Search Create a restore point, Configure, and set Max Usage to about 5 percent. Click Delete to clear old points, then create one fresh point.
- 3
Shrink hibernation
In an administrator Command Prompt run: powercfg /h /size 40. On a desktop you can disable it fully with powercfg /h off, which frees several GB.
- 4
See what is really there
Install WizTree or TreeSize Free. It maps every folder by size in seconds so you can see the real space hog instead of guessing.
If none of that worked
If OneDrive is syncing everything locally, right click the OneDrive folder and choose Free up space to keep files in the cloud only.
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The CommonFixes team
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This guide was last updated on 10 August 2026. If a step no longer matches what you see on screen, tell us on the contact page and we will test it again.
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