Start with the built-in Windows cleanup tools

Windows includes two free tools that remove temporary files and old system data without touching your documents or programs. Disk Cleanup is the fastest way to recover space in minutes. 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 "Temporary files," "Recycle Bin," and "Temporary Internet Files." Click Delete and confirm. You will typically free 500 MB to 2 GB depending on how long it has been since you last cleaned.

For a deeper clean, use Storage Sense, which automatically removes old files and can be set to run on a schedule. Go to Settings > System > Storage, toggle on "Storage Sense," then click "Clean now." You can also set it to delete files in your Downloads folder that have not been opened in 30 days, and to empty the Recycle Bin automatically after 30 days. This is the gentler option because it gives you time to recover files if you change your mind.

Key Takeaways

  • Disk Cleanup and Storage Sense are built into Windows and remove temporary files without deleting your documents or programs.
  • Large files like old video projects, installer files, and duplicate photos often take up the most space and are safe to delete once you have backed them up.
  • Uninstalling programs you no longer use through Settings > Apps > Installed Apps frees space faster than deleting files manually.
  • Check your Downloads folder, Desktop, and Documents folder first—these are where most unnecessary files accumulate.
  • Move large files to an external drive or cloud storage before deleting them if you might need them later.

Find and delete large files you no longer need

Once you have run the cleanup tools, look for the files taking up the most space. Open File Explorer, right-click your C: drive, select Properties, and note how much space is used. Then use the built-in search to find large files: click the search box in File Explorer, type "size:>100MB" to show files larger than 100 MB. Sort by date modified to see which ones you have not touched in months. Video project files, old game installations, and backup folders are common culprits.

Before you delete anything large, move it to an external hard drive or cloud storage like OneDrive or Google Drive if you think you might need it later. Plug in an external drive, open File Explorer, and drag the files over. This takes longer than deleting but gives you a safety net. Once the files are copied, delete the originals from your PC by right-clicking and selecting Delete, then empty the Recycle Bin to reclaim the space permanently.

Uninstall programs you do not use

Programs you installed but no longer use often occupy gigabytes of space. Go to Settings > Apps > Installed Apps, scroll through the list, and look for anything you have not opened in months. Games, old versions of software, and trial programs are prime candidates. Click the program name and select Uninstall, then follow the prompts. This removes both the program files and the space they occupied.

Be cautious with programs that sound like system files—anything with "Windows," "Microsoft," or "Intel" in the name is usually part of your operating system and should stay. If you are unsure whether a program is safe to remove, search its name online before uninstalling. After you uninstall a program, restart your PC to make sure the space is fully released.

Clear out your Downloads and Documents folders

The Downloads folder is where most people accumulate files they forget about. Open File Explorer, navigate to Downloads, and sort by date modified to see the oldest files first. Installer files (.exe or .msi files) are safe to delete once you have installed the program—you can always read them again if needed. Old email attachments, screenshots, and documents you have moved elsewhere can also go. Select multiple files by holding Ctrl and clicking each one, then press Delete.

Check your Desktop and Documents folder the same way. Many people save files to the Desktop as a temporary holding spot and never move them. If a file has been sitting there for more than a month and you have not opened it, it is probably safe to delete or move to cloud storage. This usually frees 500 MB to 1 GB without any risk.

Remove duplicate files and old backups

If you have synced your PC to OneDrive, Google Drive, or another cloud service, you may have duplicate copies of files taking up space. Open File Explorer and look in your user folder (usually C:\Users\YourName) for folders named "OneDrive," "Google Drive," or similar. If the same files exist both in these folders and elsewhere on your drive, you can safely delete one copy. Keep the cloud version as your backup.

Old Windows backups and system restore points also consume space. Go to Settings > System > Storage > Temporary files, check "Previous versions of Windows" and "System created restore points," then click Delete. This removes old backups but keeps your current Windows installation intact. Only do this if you are confident your current Windows setup is working well and you do not need to roll back to an older version.

Move files to cloud storage or an external drive

If you have photos, videos, or documents you want to keep but do not need on your PC every day, moving them to cloud storage or an external drive is faster than deleting. OneDrive (built into Windows), Google Drive, and Dropbox all let you upload files and access them from any device. Drag your files into the cloud folder, wait for them to sync, then delete the originals from your PC. You free up space while keeping the files safe.

External hard drives are also inexpensive—a 1 TB drive costs $40 to $60 and can hold thousands of photos and videos. Plug it in, create a folder for your files, and drag them over. Once the transfer is complete, delete the originals. This is the safest option if you have very large files or want a backup that does not depend on internet access.

Check what is using the most space with Storage settings

Windows shows you a breakdown of what is consuming your disc space. Go to Settings > System > Storage and scroll down to see categories like Apps & features, Photos, Videos, Music, Documents, and Other. Click each category to see what files are inside. This helps you spot problem areas—for example, if Videos is using 50 GB, you know to look there first for old recordings or downloads you can delete.

The "Other" category often contains cache files, temporary data, and system files that are harder to identify. Storage Sense can clean some of this automatically, but if "Other" is very large (more than 10 GB), you may have leftover files from old programs or corrupted downloads. Run Disk Cleanup and Storage Sense again, then check the number. If it does not improve, you can safely ignore it—Windows needs some space for system operations.

Frequently Asked Questions

Is it safe to delete files from the Temp folder?

Yes. The Temp folder (usually C:\Users\YourName\AppData\Local\Temp) contains temporary files that programs create while running. These files are meant to be deleted and are safe to remove manually. However, Disk Cleanup and Storage Sense already handle this, so you do not need to do it yourself unless you want to be thorough.

What should I do if my PC is still slow after clearing disc space?

Disc space and PC speed are separate issues. A full drive can slow things down, but a slow PC after cleanup usually points to other problems like too many programs running at startup, malware, or an aging hard drive. Check Task Manager (Ctrl+Shift+Esc) to see what programs are using CPU and memory, and disable startup programs you do not need in Settings > Apps > Startup.

Can I delete Windows Update files to free space?

Windows Update files in C:\Windows\SoftwareDistribution can be deleted, but only if you are certain your current Windows version is stable and you do not plan to uninstall recent updates. Disk Cleanup handles this safely. If you are unsure, let Storage Sense manage it automatically instead of deleting manually.

How much disc space should I keep free?

Windows performs best when you have at least 10 to 15 percent of your drive free. If your drive is 500 GB, aim to keep 50 to 75 GB available. This gives Windows room to create temporary files, install updates, and run smoothly. If you regularly fall below this, consider moving files to cloud storage or upgrading to a larger drive.

Will clearing disc space improve my internet speed?

No. Disc space and internet speed are unrelated. Clearing space may make your PC run faster overall, which can make web pages load slightly quicker, but it will not change your actual internet connection speed. If your internet is slow, the issue is with your network or service provider, not your hard drive.