Start by finding what's taking up the most space

Before you delete anything, you need to see which files and folders are actually using your storage. Windows includes a built-in tool called Storage Sense that shows you exactly what's consuming space. Open Settings, go to System, then Storage — you'll see a breakdown by category: apps, photos, videos, documents, and other files. The largest categories appear at the top.

If you want more detail about individual folders, use the Disk Usage Analyzer. Right-click your C: drive (or whichever drive is full), select Properties, then click "Disk Cleanup" — this opens a window showing which file types are taking up the most room. You can also read a free tool like WinDirStat, which displays your entire drive as a visual map where larger files appear as bigger blocks. This makes it obvious which folders to target first.

Key Takeaways

  • Use Windows Storage Sense or Disk Cleanup to identify which files and folders are using the most space before you start deleting.
  • Empty your Recycle Bin after deleting files, since deleted items stay there until you permanently remove them.
  • Clear your Downloads folder, temporary files, and old Windows installation files — these three sources often free up 10 to 50 gigabytes.
  • Uninstall programs you no longer use through Settings > Apps > Apps and Features, not by deleting their folders manually.
  • Move large files like videos, photos, and archived documents to an external drive or cloud storage to keep them without using local space.

Delete files from your Downloads folder and Temp folders

Your Downloads folder accumulates installers, documents, and files you've forgotten about. Open File Explorer, navigate to Downloads, and sort by date modified — anything older than a few months is usually safe to delete. Select multiple files by holding Ctrl and clicking, then press Delete. Do the same for your Documents folder if you see old files there.

Windows also stores temporary files that pile up over time. Press Windows key + R, type %temp%, and press Enter — this opens your Temp folder. Select all files (Ctrl + A), then delete them. Some files may be in use and won't delete; skip those. You can also use Disk Cleanup: right-click your C: drive, select Properties, click "Disk Cleanup", check the boxes for "Temporary files" and "Recycle Bin", then click "Clean up system files". This removes old Windows installation files from previous updates, which can free up 5 to 20 gigabytes.

Uninstall programs you no longer use

Programs take up significant space, and many people keep software they haven't opened in months. Open Settings, go to Apps, then Apps and Features. Scroll through the list and look for anything you don't recognize or no longer need. Click the program name, then click Uninstall and follow the prompts. Do this for games, trial software, and duplicate programs (for example, if you have both Firefox and Chrome but only use one).

Be cautious with system programs — if you don't recognize the name, search for it online before removing it. Programs like Intel or NVIDIA drivers, Windows Defender, and system utilities should stay. After uninstalling, restart your PC so Windows can clean up leftover files. Uninstalling 5 to 10 unused programs often frees up 20 to 50 gigabytes depending on what they were.

Empty your Recycle Bin and clear browser cache

When you delete a file, it goes to the Recycle Bin but still uses storage space. Right-click the Recycle Bin icon on your desktop, select "Empty Recycle Bin", and confirm. This permanently removes deleted files. If you don't see the Recycle Bin on your desktop, open File Explorer, right-click in the left sidebar, and select "Show Recycle Bin".

Your web browser stores cached files — copies of images, scripts, and pages from websites you visit. These accumulate and can use several gigabytes. In Chrome, press Ctrl + Shift + Delete to open Clear Browsing Data; select "All time" and check Cookies, Cache, and Images, then click Clear Data. In Edge, press Ctrl + Shift + Delete and do the same. In Firefox, go to Settings > Privacy & Security, scroll to Cookies and Site Data, and click "Clear Data".

Move large files to external storage or cloud backup

If you have large video files, photo libraries, or archived documents, moving them to an external drive or cloud storage frees up space without losing them. Connect an external hard drive or USB drive to your PC. Open File Explorer, find your large files (usually in Pictures, Videos, or Documents), right-click them, select "Cut", navigate to your external drive, and paste. This removes them from your PC while keeping them safe.

Alternatively, use cloud storage like OneDrive (included with Windows), Google Drive, or Dropbox. Upload your large files to the cloud, then delete the local copies from your PC. You can still access them online anytime. This is especially useful for files you don't need to access frequently but want to keep. A 2-terabyte external drive costs between $50 and $100 and can hold years of photos and videos.

Turn on Storage Sense for automatic cleanup

Windows can automatically delete temporary files and empty your Recycle Bin on a schedule. Open Settings, go to System > Storage, then scroll down and click "Storage Sense". Toggle it on, then click "Configure Storage Sense or run it now". You can set it to run daily, weekly, or monthly. Choose what you want it to delete: temporary files, Recycle Bin contents, and files in your Downloads folder that haven't been opened in a certain number of days.

Be careful with the Downloads folder setting — if you set it to delete files after 30 days, you might lose something you need. The safest approach is to have Storage Sense delete only temporary files and Recycle Bin contents automatically, and manually review your Downloads folder once a month. This prevents your PC from filling up again without the risk of losing files you meant to keep.

Check for duplicate files and old backups

Over time, you may have duplicate copies of photos, documents, or other files scattered across your PC. Search your Documents and Pictures folders for files with similar names or creation dates. You can also use a free tool like Duplicate File Finder to scan your entire drive and show you exact duplicates. Delete the copies you don't need, keeping only one version of each file.

Windows also creates backup files and restore points that consume space. Open Settings, go to System > Storage > Temporary files, and look for "Previous versions of Windows" or "System restore points". If you're confident your current Windows installation is working well, you can delete old restore points. Click "Previous versions of Windows" if it appears, then delete. This can free up 10 to 30 gigabytes. Do not delete the current Windows installation files — only old versions from previous updates.

Frequently Asked Questions

How much space should I keep free on my PC?

Windows performs best when you have at least 10 to 15 percent of your drive free. If your drive is nearly full, your PC slows down because Windows can't create temporary files or cache data efficiently. If you have a 500-gigabyte drive, aim to keep at least 50 gigabytes free.

Is it safe to delete files from the Temp folder?

Yes, it's safe to delete files from the Temp folder. These are temporary files created by Windows and programs, and they're meant to be deleted. Some files may be in use and won't delete — Windows will skip those automatically. Restart your PC afterward to may support no programs are still using them.

What's the difference between deleting and uninstalling a program?

Deleting a program's folder leaves behind registry entries and leftover files that still use space and can cause errors. Uninstalling through Settings > Apps removes the program completely, including all its files and registry entries. Always uninstall through Settings, not by deleting folders manually.

Can I move Windows itself to an external drive?

No, Windows must stay on your C: drive. However, you can move your Documents, Pictures, Videos, and Downloads folders to an external drive or second internal drive. Right-click the folder in File Explorer, select Properties, go to the Location tab, click Move, and choose your external drive. Windows will move all files there automatically.

Will clearing cache and temporary files slow down my PC?

No, it will actually speed it up. Temporary files and cache accumulate and can slow down your system. Clearing them removes clutter and frees up space for Windows to work efficiently. Your browser will rebuild its cache as you browse, so you won't notice any difference in performance.