Introduction
Have you ever tried to update Windows only to see an error like “Not enough free space” or “There’s not enough disk space for update preparation”? It happens—Windows 10 and 11 updates can require 10 to 20 GB of free space, and without it, security patches can’t be installed, leaving your PC vulnerable.
This guide provides seven simple, effective steps to free up disk space so you can smoothly complete your update—even if you’re not tech-savvy. Let’s dive in!
1. Check Available Disk Space
Why it matters: You need to know exactly how much space you have—and need.
- Open File Explorer (Windows key + E).
- Click This PC, then look under Local Disk (C:) to see “Free space.”
- Aim for at least 10 GB, though newer Windows 11 Feature Updates may require 15–20 GB.
If you’re below that threshold, it’s time to free up space.
2. Run Disk Cleanup (with System Files)
What it does: Removes temporary files, update leftovers, and more.
- Search Disk Cleanup in the Start menu and open it.
- Select your C: drive.
- Click Clean up system files.
- Mark Windows Update Cleanup and any other large items, then press OK.
Why it matters: You’ll often free up several gigabytes in just minutes.
3. Remove Temporary Files and Unused Apps
Steps to follow:
- Go to Settings → System → Storage.
- Click Temporary files and delete what’s safe to remove.
- Visit Settings → Apps → Apps & Features, and uninstall any unused programs—especially large ones like video editors or big games.
Tip: These apps can occupy 10 GB or more, especially old games or editing suites.
4. Use a USB Drive to Free Temporary Space
How it works: Windows lets you offload part of the update process to an external drive.
- Plug in a USB flash drive with at least 16 GB free.
- Keep it connected while running the update.
- Windows will temporarily store update files on your USB.
Why it helps: Even if your C: drive is limited, this method keeps the update moving forward.
5. Enable and Use Storage Sense
Storage Sense helps automatically delete junk files.
- Navigate to Settings → System → Storage.
- Turn on Storage Sense and optionally run it immediately.
What it cleans: Temporary files, recycle bin contents, outdated update packages, and more.
6. Move Files to OneDrive or External Storage
To free more space:
- Upload large files like photos and videos to OneDrive.
- Or move them to an external HDD/SSD.
- Then delete the originals from your C: drive.
Why it matters: Individual videos and photo libraries can free up several gigabytes.
7. Expand Your C: Drive (Advanced Users)
Only try this if you have unused space on your disk and feel comfortable working with partitions.
- Right-click the Start button, open Disk Management.
- If there’s unallocated space next to C:, right-click C: and select Extend Volume.
Caution: Mistakes here can cause data loss. Always back up first!
👀 Bonus Tips
A. Clean Up Hidden Storage Hogs
Check for folders like Windows.old, browser caches, or app logs. These can quietly occupy dozens of GB. Removing them via cleanup tools or manually (with caution) can reclaim major space.
B. Keep Running Out of Space? Prevent It Preemptively.
- Run Storage Sense monthly
- Regularly clear Downloads folder
- Store large media on external drives
- Limit folder syncing in OneDrive
C. Final Option: Use a Clean Install or USB Installer
If nothing else works, consider using Media Creation Tool to upgrade via USB or perform a clean install (backup required).
Summary Table
| Method | Space Freed | Ease |
|---|---|---|
| Disk Cleanup | Several GB to 10+ GB | ★★★★★ (Very Easy) |
| Remove Unused Apps | Varies, often large | ★★★★☆ (Easy–Moderate) |
| USB Drive for Update | Temporary niche solution | ★★★☆☆ (Moderate) |
| Move Files to Cloud/External | Large media ⇒ many GB | ★★★★☆ (Easy–Moderate) |
| Extend C: Drive | Only if unallocated exists | ★★☆☆☆ (Advanced) |
Running out of disk space during a Windows update can be frustrating—but with these tips, most users can quickly secure the required 10–20 GB and complete the update safely. Set a monthly routine for cleanup and backups, and you’ll avoid this issue in the future.
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✔️You might also find these helpful:
▶︎Is Your PC Sluggish? Here’s How to Clean and Speed Up Your Windows Computer
💡 Looking for more tips? Check out our full list of Windows Help Guides.
