Start with the built-in Windows cleanup tools

Windows includes two tools that find and remove files taking up space without you having to hunt through folders manually. The first is Disk Cleanup, which removes temporary files, old Windows updates, and the recycle bin contents. Open it by typing "Disk Cleanup" into the Windows search box, select your C: drive (or whichever drive is full), and check the boxes next to file types you want to remove. Windows will show you how much space each category uses before you delete anything.

The second tool is Storage Sense, available in Windows 10 and 11. Go to Settings > System > Storage, turn on Storage Sense, and Windows will automatically delete temporary files and empty your recycle bin on a schedule you set. You can also run it manually by clicking "Clean now" on the same page. Storage Sense is gentler than Disk Cleanup because it only removes files Windows knows are safe to delete.

Both tools take 5 to 15 minutes to scan your drive. Neither will delete your documents, photos, or programs unless you tell them to.

Key Takeaways

  • Disk Cleanup and Storage Sense remove temporary files and old updates without touching your documents or programs.
  • Large files like old video projects, installers, and duplicate photos often account for gigabytes of wasted space and can be found using the built-in file search.
  • Uninstalling programs you no longer use through Settings > Apps > Installed Apps recovers space faster than deleting files manually.
  • Moving files to an external drive or cloud storage frees up space without losing them, and is the safest option for documents and photos you want to keep.
  • Check your Downloads folder and Desktop regularly—they accumulate installers and temporary files that pile up over months.

Find and delete large files you no longer need

Large files are often the real culprit when your drive fills up. Video projects, old game installations, and duplicate photos can each take up 5 to 50 gigabytes. To find them, open File Explorer, right-click your C: drive, and select Properties. The pie chart shows what is using space, but to see individual large files, use the search function. Click in the search box at the top right, type "size:>100MB" (without quotes) to find files larger than 100 megabytes, then sort by date modified to see which ones you have not touched in months.

Go through the results and delete anything you recognize as old or unnecessary. Installers for programs you already have installed are safe to delete—Windows keeps the program itself elsewhere. Old downloads, incomplete projects, and duplicate files are also safe targets. Drag them to the recycle bin, then empty the recycle bin to actually free up the space.

This search usually takes 2 to 5 minutes and often finds 10 to 50 gigabytes of deletable files on a full drive.

Uninstall programs you no longer use

Programs take up space not just in their installation folder but also in system files scattered across your drive. Uninstalling them properly removes all of it. Go to Settings > Apps > Installed Apps, scroll through the list, and click the three dots next to any program you do not use. Select "Uninstall" and follow the prompts. Windows will remove the program and its associated files.

Games and creative software (video editors, design tools, large development environments) often use 5 to 100 gigabytes each. If you have not opened a program in six months, uninstalling it is usually safe. You can always reinstall it later if you change your mind. Uninstalling 3 to 5 unused programs often frees up 20 to 50 gigabytes.

Do not uninstall anything you are unsure about—if you do not recognize the name, search for it online first to confirm it is not a Windows system component.

Move files to external storage or cloud backup

If you want to keep files but need them off your main drive, move them to an external hard drive or cloud storage. This is safer than deleting because you still have the files if you need them later. Connect an external drive, open File Explorer, and drag your Documents, Pictures, or Videos folders to it. For cloud storage, services like OneDrive (built into Windows), Google Drive, or Dropbox let you upload files from your PC and access them from anywhere.

Moving a folder with 100 gigabytes of photos or videos to external storage takes 30 minutes to an hour depending on the drive speed, but it completely frees up that space on your PC. Cloud uploads are slower—expect 1 to 5 gigabytes per hour depending on your internet speed—but you do not need to buy hardware.

After files are safely on external storage or in the cloud, delete them from your PC. This is the lowest-risk way to clear space because you have a backup before anything is gone.

Empty the recycle bin and temporary folders

When you delete a file, it goes to the recycle bin and still takes up space until you empty it. Right-click the recycle bin on your desktop and select "Empty Recycle Bin." This usually frees up 1 to 10 gigabytes depending on how long it has been since you last emptied it.

Windows also stores temporary files in hidden folders. You can delete these manually by opening File Explorer, going to C:\Users\[YourUsername]\AppData\Local\Temp, and deleting everything inside. Close all open programs first—some may be using files in this folder. If you get an error saying a file is in use, skip it and move on. Clearing the Temp folder usually recovers 1 to 5 gigabytes.

These are safe deletions because temporary files are meant to be cleaned up. Windows will recreate them as needed.

Check your Downloads folder

The Downloads folder accumulates installers, documents, and files you downloaded months ago and forgot about. Open File Explorer, go to Downloads, and sort by date modified to see the oldest files first. Delete installers for programs you already have installed, old email attachments, and anything you no longer recognize. Most people find 5 to 20 gigabytes of deletable files here.

Make this a monthly habit—spend 5 minutes deleting old downloads before they pile up. It is one of the easiest ways to prevent your drive from filling up again.

Disable or reduce Windows Update backups

Windows keeps backup copies of old updates in case you need to roll back to a previous version. These files sit in a folder called WinSxS and can use 10 to 30 gigabytes. If your drive is very full and you have not rolled back an update in years, you can safely delete old update backups. Go to Settings > System > Storage > Temporary Files, check "Previous Windows installation(s)" and "Recycle Bin," then click "Remove files." This usually frees up 10 to 20 gigabytes.

Do this only if your drive is critically full—keeping a few old updates available is useful in case a new update causes problems. After you free up space this way, Windows will start storing new updates normally again.

Frequently Asked Questions

Is it safe to delete files from the Windows folder?

No. The Windows folder contains system files your PC needs to run. Stick to Disk Cleanup, Storage Sense, and the Temp folder—these tools only touch files Windows knows are safe to remove. If you delete something from the Windows folder by mistake, your PC may not start up.

What if I run out of space while deleting files?

Windows needs a small amount of free space to function. If you have less than 1 gigabyte free, use Disk Cleanup or Storage Sense first—they are designed to work even when space is very tight. If that does not help, restart your PC in Safe Mode and try again, or connect an external drive and move files to it.

Can I move my entire Documents folder to an external drive?

Yes. Right-click your Documents folder, select "Properties," go to the "Location" tab, and click "Move." Choose your external drive. Windows will move all your files and remember the new location. From then on, Documents will save to the external drive automatically.

How much space should I keep free on my drive?

Windows works best with at least 10 to 15 percent of your drive free. If your drive is 500 gigabytes, keep 50 to 75 gigabytes empty. This gives Windows room to create temporary files and install updates without slowing down.

Will clearing disk space make my PC faster?

Slightly. A very full drive can slow down Windows because it has less room to work with. Freeing up space to 20 to 30 percent full will improve performance a little, but the biggest speed gains usually come from uninstalling unused programs and restarting your PC regularly.