Start by finding what's taking up the most room

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 percentages tell you where to focus first.

If you want more detail about individual folders, use a free tool like WizTree or TreeSize Free. These programs show you a visual map of your entire drive, with the largest folders highlighted. You can see at a glance whether your Downloads folder, Documents, or a specific program is hogging space. This takes the guesswork out of deciding what to delete.

Key Takeaways

  • Use Windows Storage Sense or a free mapping tool to identify which files and folders are using the most space before you delete anything.
  • Your Downloads folder, temporary files, and old Windows installations often hold gigabytes you can safely remove without losing anything important.
  • Uninstall programs you no longer use through Settings or Control Panel, not by dragging them to the trash — this removes all their files, not just the folder.
  • Move large files like videos, photos, and archived documents to an external drive or cloud storage to free up internal space while keeping them safe.
  • Empty the Recycle Bin after deleting files, because deleted items stay there until you do — they still take up space on your drive.

Clear out your Downloads folder and temporary files

Your Downloads folder is often the easiest place to find space. Most people read files and never organize them — installers, PDFs, old email attachments, and things you downloaded once and forgot about all pile up. Open File Explorer, go to Downloads, sort by date modified, and delete anything older than a few months that you don't recognize or no longer need. If you're unsure whether you need something, move it to an external drive first rather than deleting it permanently.

Windows also stores temporary files that accumulate over time. In Storage Sense, click "Temporary files" and Windows will show you cache files, old Windows updates, and installation leftovers. You can safely delete these — Windows will recreate them if it needs them. This often frees up several gigabytes without touching anything you actually use.

Uninstall programs you're not using

Programs take up space not just in their main folder, but scattered across your system in support files and libraries. Deleting a program's folder manually leaves behind pieces. Instead, use the proper uninstall process. Go to Settings, Apps, Apps & Features, find the program you want to remove, click it, and select Uninstall. Windows will remove the entire program and its associated files.

Look for programs you installed once and never opened again — old games, trial software, duplicate tools. If you're not sure what something does, search the program name online before uninstalling. Some programs you think are bloatware might actually be drivers or system utilities you need. When in doubt, leave it alone.

Move large files to external storage or cloud backup

Large files like video projects, photo libraries, and archived documents don't need to live on your main drive. Connect an external hard drive or USB drive and move these files there. You keep them, your PC gets space back, and they're backed up in a separate location. This is especially useful for video files, which can easily consume 50 gigabytes or more.

Cloud storage services like OneDrive, Google Drive, or Dropbox also work well for files you need to access sometimes but don't use daily. You can set them to "online-only" mode, which means the files stay in the cloud and only read to your PC when you open them. This gives you access without using local storage. Just remember that cloud storage requires an internet connection to access files, while an external drive works offline.

Delete old Windows installations and update files

When Windows updates, it sometimes keeps a copy of the old version in a folder called Windows.old. This folder can be 20 gigabytes or larger. If your PC is running smoothly after an update and you don't plan to roll back, you can delete it. Go to Settings, System, Storage, and look for "Previous versions of Windows" — click it and select Delete.

Old Windows update files also accumulate in the WinSxS folder and temporary update caches. Storage Sense can clean these up automatically. In Settings, go to System, Storage, and turn on "Storage Sense." You can set it to automatically delete temporary files and old Windows versions after a certain number of days, or run it manually whenever you need space.

Empty your Recycle Bin

When you delete a file, it goes to the Recycle Bin — it's still on your drive, still taking up space, just hidden from view. Emptying the Recycle Bin actually removes those files and frees up the space. Right-click the Recycle Bin on your desktop and select "Empty Recycle Bin." If you don't see it on your desktop, you can access it through File Explorer.

Be careful: once you empty the Recycle Bin, those files are much harder to recover. If you're deleting something you're not completely sure about, move it to an external drive first instead of deleting it. Once you're confident you don't need it, then delete it and empty the bin.

Turn off or reduce cloud sync and cache files

Programs like OneDrive, Dropbox, and web browsers store cached versions of files and web pages on your drive. These caches speed things up but consume space over time. In OneDrive settings, you can switch to "Files On-Demand" mode, which stores only the file names locally and downloads the actual files when you open them. This frees up gigabytes while keeping everything accessible.

Browser caches also add up — Chrome, Edge, and Firefox all store copies of websites you've visited. You can clear these manually in each browser's settings under Privacy or History. Most browsers have an option to automatically clear cache when you close them, which prevents buildup without requiring you to remember to clean it out.

Frequently Asked Questions

How much free space should I keep on my PC?

Windows needs at least 10 to 15 percent of your total drive space free to run smoothly. If your drive is nearly full, your PC will slow down noticeably. Aim for 20 percent free if possible — on a 500 GB drive, that's 100 GB. If you're consistently running out of space, consider upgrading to a larger drive or moving files to external storage permanently.

Is it safe to delete files from the Windows folder?

No. The Windows folder contains system files your PC needs to run. Deleting from it can break your operating system. Stick to your Downloads, Documents, and Desktop folders, plus the Recycle Bin and temporary files that Storage Sense identifies. If you're unsure whether a file is safe to delete, don't touch it.

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

Deleting a program folder only removes the main files you see. Uninstalling through Settings removes the program, its support files, and registry entries scattered throughout your system. Always uninstall through Settings or Control Panel, not by dragging the folder to trash. This removes everything and frees up the most space.

Can I recover files after I empty the Recycle Bin?

Recovery is possible but difficult and not may provide. Specialized recovery software like Recuva can sometimes restore deleted files, but the longer you wait and the more you use your drive, the less likely recovery becomes. Don't count on it — treat the Recycle Bin as your final note to change your mind before files are gone.

Should I use disk cleanup tools from third parties?

Windows Storage Sense handles most cleanup safely. Third-party tools like CCleaner can remove more aggressive caches, but they sometimes delete files you actually need. If you use one, let it show you what it plans to delete before confirming, and avoid letting it modify your registry unless you know what you're doing.