How to Fix Low Disk Space on Windows

Low disk space on Windows usually happens when temporary files, update leftovers, app caches, Downloads, and old system files build up over time. Large apps, games, videos, and restore points can also quietly consume tens or hundreds of gigabytes. On smaller SSDs, even normal use can fill the drive faster than most people expect.

Common Symptoms

• Windows shows a “Low disk space” warning for your C: drive
• Updates fail or won’t install
• Your PC feels slower than usual, especially when opening apps or saving files
• You can’t download new files or install programs
• File Explorer shows the drive in red and very little free space remaining

How to Fix It Manually

1. Check what is using space

   • Press Windows + I to open Settings.
   • Go to System > Storage.
   • Wait for Windows to calculate usage, then review categories like Apps, Temporary files, Documents, and Other.
   • This helps you target the biggest space hogs first.

2. Delete temporary files with Storage settings

   • In Settings > System > Storage, click Temporary files.
   • Check items you want to remove, such as:
     • Temporary files
     • Delivery Optimization Files
     • Thumbnails
     • Windows Update Cleanup
     • Recycle Bin
   • Read the list carefully before selecting Downloads, since that may contain personal files you still need.
   • Click Remove files.

3. Run Disk Cleanup for system files

   • Open the Start menu, type Disk Cleanup, and open it.
   • Select your C: drive and click OK.
   • Click Clean up system files.
   • Select items such as Temporary Internet Files, Device driver packages, Windows Update Cleanup, and Previous Windows installation(s) if available.
   • Click OK, then Delete Files.
   • If you see Previous Windows installation(s), removing it can free a large amount of space, but you won’t be able to roll back to the previous Windows version afterward.

4. Uninstall apps and games you no longer use

   • Press Windows + I and go to Apps > Installed apps.
   • Sort by Size to find the largest programs.
   • Click the three dots next to unused apps and choose Uninstall.
   • Be especially careful with large games, editing software, and manufacturer trialware.

5. Move or remove large personal files

   • Open File Explorer with Windows + E.
   • Check folders like Downloads, Desktop, Videos, and Documents for large files.
   • Sort by size if needed, then delete what you don’t need or move files to:
     • An external drive
     • Another internal drive
     • Cloud storage like OneDrive
   • After deleting files, right-click Recycle Bin and choose Empty Recycle Bin.

6. Turn on Storage Sense

   • Go to Settings > System > Storage.
   • Turn on Storage Sense.
   • Click Storage Sense to configure how often Windows removes temporary files and empties the Recycle Bin automatically.
   • This helps prevent the problem from coming back.

Fix It Automatically with Kudu

Kudu can scan your PC for junk files, temporary data, update leftovers, caches, and other safe-to-remove clutter that wastes storage space. It saves time by finding cleanup opportunities across Windows and installed apps without making you dig through folders manually.

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