How to Free Up Disk Space on Windows (Reclaim 20+ GB)
Your C drive is almost full. Here are 8 safe ways to reclaim 20 or more gigabytes without losing anything important.
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Check What Is Using Your Space
Before deleting anything, see where your space went. Go to Settings, System, Storage. Windows shows a breakdown of what is using your drive: apps, temporary files, documents, system files, and other. Click each category to see details. This prevents you from blindly deleting things and tells you exactly where the biggest wins are.
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Method 1: Windows Disk Cleanup (5-15 GB)
Search for Disk Cleanup in the Start menu. Select your C drive and click OK. After it calculates, click Clean Up System Files at the bottom. Now check these boxes: Windows Update Cleanup (often 3 to 10 GB), Previous Windows Installations (up to 20 GB after a major update), Temporary Files, Delivery Optimization Files, and Thumbnails. Click OK and Delete Files. This is the single highest-impact cleanup you can do.
Method 2: Clear Temp Files (1-5 GB)
Press Win+R, type %temp%, and press Enter. Select all files in the folder with Ctrl+A and delete them. Some files will be in use and cannot be deleted — just skip those. Also type temp in the Run dialog and clear that folder. These are temporary files that Windows and apps create but never clean up. They accumulate over months and years.
Method 3: Uninstall Unused Apps (2-10 GB)
Go to Settings, Apps, Installed Apps, and sort by Size. You will likely find apps you forgot you installed. Games, trial software, and OEM bloatware from your laptop manufacturer are common space wasters. Click the three dots next to each app and select Uninstall. Focus on anything over 500 MB that you do not use regularly.
Method 4: Move Files to External Storage
Your Documents, Pictures, Videos, and Downloads folders may contain gigabytes of files. Move large files like videos, old photos, and downloads to an external hard drive or cloud storage. You can also change the default save location for these folders: go to Settings, System, Storage, Advanced Storage Settings, Where New Content Is Saved, and point each category to an external drive.
Pro Tips
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Frequently Asked Questions
Is it safe to delete everything in Disk Cleanup?
Yes. Everything listed in Disk Cleanup is safe to delete. These are temporary, cached, or outdated files that Windows no longer needs. The only item to be cautious about is Previous Windows Installations — deleting this means you cannot roll back to the previous Windows version, but it is safe to remove after you confirm the current version works fine.
