Start with the files taking up the most room

The fastest way to free up space is to find what is actually using it. Windows has a built-in tool that shows you exactly which folders and files are largest. Open Settings, go to System, then Storage, and click "Storage analysis" or "Manage storage" — the exact name depends on your Windows version. The tool will scan your drive and list everything by size, from biggest to smallest.

Look for folders you recognize: old video files, downloaded installers, backup copies of photos. These are safe to delete if you have them stored elsewhere. Avoid deleting anything in Program Files, Windows, or AppData unless you know exactly what it does — those folders contain programs and system files your PC needs to run.

If you have multiple drives, check each one. External drives and secondary internal drives often hold old files people forget about. A single forgotten backup folder can free up 50 gigabytes or more.

Key Takeaways

  • Use Windows Storage analysis to see which folders are largest, then delete old backups, downloaded installers, and video files you have stored elsewhere.
  • Empty your Recycle Bin after deleting files, because deleted items still take up space until the bin is emptied.
  • Clear your Downloads folder regularly — it accumulates installers and files you no longer need.
  • Temporary files and old Windows installations can be safely removed through Disk Cleanup or Settings, freeing several gigabytes without touching your documents.
  • Move large files like photos and videos to external drives or cloud storage to keep your main drive running fast.

Empty the Recycle Bin and Downloads folder

When you delete a file, it goes to the Recycle Bin but still takes up space on your drive. Right-click the Recycle Bin on your desktop and select "Empty Recycle Bin." This permanently removes the files and actually frees the space.

Your Downloads folder is another common space hog. Most people read installers, documents, and files they never look at again. Open File Explorer, go to Downloads, and sort by date modified. Delete old installers — you can always read them again if you need them. Delete duplicate files and old documents you have saved elsewhere.

Make a habit of clearing Downloads once a month. It takes five minutes and often frees up several gigabytes.

Remove temporary files and old Windows versions

Windows creates temporary files while programs run. These files are supposed to clean themselves up, but they often pile up. Go to Settings, System, Storage, and look for "Temporary files" — Windows will show you how much space they are using. Click on it and select "Remove files." Windows will delete temporary files, old log files, and cached data.

If you recently updated Windows, your old version is stored as a backup. After you confirm the new version works properly, you can delete it. In Storage settings, look for "Previous versions of Windows" and remove it if it appears. This single step can free 10 to 20 gigabytes.

You can also use Disk Cleanup, an older Windows tool that does similar work. Search for "Disk Cleanup" in the Start menu, select your drive, and check the boxes next to items you want to remove. Temporary files, recycle bin contents, and old Windows files are all safe to delete here.

Uninstall programs you no longer use

Programs take up space even when you are not using them. Go to Settings, Apps, Apps and features, and scroll through the list. Look for programs you have not opened in months. Click on them and select "Uninstall." This removes the program files and frees the space they occupied.

Be selective — do not uninstall something just because you are unsure what it does. Uninstall things you know you do not use: old games, trial software, duplicate browsers, or programs that came with your PC that you never wanted. Uninstalling 5 to 10 unused programs can free 20 to 50 gigabytes depending on what they were.

After uninstalling, go back to Storage settings and run the temporary files cleanup again. Uninstallers sometimes leave behind leftover files.

Move files to external storage or cloud services

If you have large files you want to keep but do not need on your main drive, move them to an external drive or cloud storage. Photos, videos, and old project files are good candidates. Plug in an external drive, open File Explorer, and drag the folders to the external drive. Once the transfer is complete, delete the originals from your PC.

Cloud services like OneDrive, Google Drive, or Dropbox let you store files online and access them from any device. You can also use them to back up important files so you can safely delete local copies. Many services offer free storage — OneDrive gives 5 gigabytes free with a Microsoft account, and Google Drive offers 15 gigabytes free with a Google account.

Moving large folders is slower than deleting, but it is the safest option if you are not ready to let files go completely.

Turn off file history and reduce system restore points

Windows keeps backup copies of your files through a feature called File History. If you have this turned on, it can use significant space over time. Go to Settings, System, Storage, and look for "System and reserved." If File History is enabled, you can turn it off or reduce how much space it uses. Go to Settings, System, About, Advanced system settings, then System Protection to adjust how many restore points Windows keeps.

System restore points let you roll back your PC to an earlier state if something goes wrong. Windows keeps multiple restore points, and they can add up. You can delete old restore points while keeping recent ones. In System Protection, select your drive and click "Configure." You can set the maximum space restore points can use — 5 to 10 percent of your drive is usually enough.

Do not turn off restore points entirely unless you are confident you will not need to roll back. Keep at least one recent restore point in case something breaks.

Check for duplicate files and compress large folders

Over time, you may have multiple copies of the same file in different folders. Search for files you know you have duplicates of — for example, search for a photo filename and see how many copies exist. Delete the duplicates, keeping only one version in your main folder.

If you have folders full of documents or archives you rarely access, you can compress them to save space. Right-click a folder, select "Send to," then "Compressed (zipped) folder." Windows will create a .zip file that takes up less space. You can still access files inside without unzipping if you need them, though unzipping is faster for regular use.

Compression works best for documents, spreadsheets, and text files. Photos and videos are already compressed, so zipping them saves little space.

Frequently Asked Questions

How much free space should I keep on my drive?

Windows runs slower when your drive is nearly full. Keep at least 10 to 15 percent of your drive free — so on a 500-gigabyte drive, keep at least 50 gigabytes empty. If your drive is smaller, aim for at least 20 to 30 gigabytes free. This gives Windows room to create temporary files and keeps your PC running at normal speed.

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 Downloads, Recycle Bin, temporary files, and programs you installed yourself. If you are unsure whether a folder is safe to delete, do not touch it.

What if I delete something important by accident?

If you deleted it recently and the Recycle Bin is still empty, you may be able to recover it using recovery software like Recuva. If you deleted it weeks ago, recovery becomes much harder. This is why keeping a backup on an external drive or cloud storage is important — you can restore from the backup instead of trying to recover deleted files.

Will clearing space make my PC faster?

Yes, but only if your drive was nearly full. A drive that is 90 percent full runs noticeably slower than one that is 50 percent full. Once you have 10 to 15 percent free space, clearing more will not speed things up much. If your PC is still slow after freeing space, the problem is likely something else, like too many programs running at startup or an aging hard drive.

Should I use a third-party cleaning tool?

Windows built-in tools do the job well for most people. Third-party cleaners like CCleaner can find extra files, but they are not necessary. If you use one, stick to well-known programs and be careful what you let them delete — some cleaners are aggressive and can remove files you want to keep. The free Windows tools are safer and usually enough.