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 and Mac both have built-in tools that show you this clearly, and they take just a few minutes to run.

On Windows 10 or 11, open Settings, go to System, then Storage. Click on "Storage analysis" or your C: drive to see a breakdown by category — apps, documents, photos, videos, and temporary files. The largest items appear at the top. On Mac, click the Apple menu, select About This Mac, then Storage. You'll see a visual bar showing what's consuming space, with categories you can click into for more detail.

Write down the top three or four space-users before you move forward. This tells you where to focus your effort — deleting 500 old photos saves far more space than deleting 100 small documents.

Key Takeaways

  • Use your operating system's built-in storage tool to identify which files and folders are using the most space before you start deleting anything.
  • Temporary files, old downloads, and duplicate photos are usually the fastest wins for freeing up gigabytes without losing anything you need.
  • Moving large files like videos and photo libraries to an external drive or cloud storage frees space permanently without deleting them.
  • Uninstalling programs you no longer use can recover several gigabytes, especially older software that came pre-installed on your computer.
  • Empty your Recycle Bin or Trash after deleting files, because deleted items still occupy space until the bin is emptied.

Clear out your Downloads folder and temporary files

Your Downloads folder collects every file you've ever downloaded — installers, PDFs, images, old versions of software — and most of it you'll never open again. This folder alone often holds several gigabytes. Open it, sort by date, and delete anything older than a few months that you don't recognize or need.

Windows also stores temporary files in a folder called Temp. Go to Settings > System > Storage > Temporary files, and Windows will show you how much space these are using. Check the boxes for "Temporary files" and "Recycle Bin," then click Delete. On Mac, temporary files are harder to access manually, but you can use the Storage recommendations built into the system — go to About This Mac > Storage > Manage, and follow the prompts to remove old files and language packs.

This step alone typically frees 2 to 5 gigabytes on most computers.

Remove duplicate and blurry photos

Photo libraries grow fast, and most people have dozens of near-identical shots from the same moment — slightly different angles, one with eyes closed, one with eyes open. Deleting duplicates and obviously blurry photos can save gigabytes without losing anything you actually want.

On Windows, open File Explorer and navigate to your Pictures folder. Sort by date, then scroll through and delete obvious duplicates and shots you know are bad. On Mac, open Photos, click View, then select "View Options" and sort by date. You can also use the Duplicate Photos tool in Photos to find near-identical images automatically.

If you have hundreds of photos, consider moving your entire photo library to cloud storage like OneDrive, Google Photos, or iCloud. These services let you store photos online and delete the local copies from your computer, freeing up 10 to 50 gigabytes depending on how many photos you have.

Uninstall programs you don't use

Old software takes up space and can slow your computer down. Go to Settings > Apps > Apps & features on Windows, or Applications folder on Mac. Look for programs you haven't opened in months — games, trial versions, old versions of software, or pre-installed bloatware. Uninstall them one at a time.

Be cautious: don't uninstall anything you're unsure about, especially if it has a name like "System" or "Service." Stick to programs you recognize and know you don't use. Uninstalling 5 to 10 unused programs typically frees 5 to 15 gigabytes.

After uninstalling, go back to Settings > System > Storage > Temporary files and delete leftover program files. Some uninstallers leave behind folders and cached data.

Move large files to external storage or the cloud

If you have video files, large project folders, or archived documents, moving them to an external hard drive or cloud storage is faster than deleting them and safer than keeping them only on your computer. An external drive costs $50 to $100 and can hold 1 to 4 terabytes. Cloud services like OneDrive, Google Drive, or Dropbox let you access files from anywhere and free up local space.

To move files, plug in an external drive, open File Explorer or Finder, and drag your large folders to the drive. Wait for the copy to finish, then delete the originals from your computer. For cloud storage, upload your files to the service, then delete the local copies once you've confirmed they're safely stored online.

This approach is ideal for video projects, old backups, or archived work folders — things you want to keep but don't need on your computer every day.

Empty your Recycle Bin or Trash

When you delete a file, it goes to the Recycle Bin on Windows or Trash on Mac, but it still takes up space on your hard drive. You have to empty the bin to actually free that space. Right-click the Recycle Bin icon on your desktop and select "Empty Recycle Bin," or on Mac, click Finder > Empty Trash.

This is the final step after you've deleted files. Until you empty the bin, the space isn't truly recovered.

Turn on Storage Sense to automate cleanup

Windows 10 and 11 have a feature called Storage Sense that automatically deletes temporary files and empties the Recycle Bin on a schedule you set. Go to Settings > System > Storage, turn on Storage Sense, then click "Configure Storage Sense or run it now." You can set it to delete files in your Recycle Bin after 30 days, remove temporary files, and delete old downloads automatically.

This prevents your computer from filling up again with temporary junk. Mac doesn't have an exact equivalent, but the Storage recommendations in About This Mac > Storage > Manage offer similar automatic cleanup options.

Frequently Asked Questions

How much space should I keep free on my hard drive?

Aim to keep at least 10 to 15 percent of your total drive capacity free. If your drive is 500 gigabytes, keep 50 to 75 gigabytes open. Your computer needs free space to run smoothly, install updates, and create temporary files while you work.

Is it safe to delete files from the Windows Temp folder?

Yes, the Temp folder is designed to hold temporary files your programs create while running. Deleting them is safe. Use the Storage > Temporary files tool in Settings rather than manually navigating to the folder, because it handles files that are currently in use.

What's the difference between moving files and deleting them?

Moving copies files to a new location — like an external drive or cloud storage — so you still have them but they no longer take up space on your computer. Deleting removes them entirely. Move files you want to keep; delete files you don't need.

Will clearing my Downloads folder delete my email attachments?

No. Deleting files from your Downloads folder only removes what you downloaded to that folder. Email attachments stay in your email account unless you delete them from your email program itself.

Can I recover files after I empty the Recycle Bin?

Recovery is possible but difficult and not may provide. Once you empty the Recycle Bin, the space is marked as available for new files to overwrite. The sooner you try to recover, the better your chances. Use data recovery software like Recuva on Windows, but know that success depends on how much new data has been written to your drive since deletion.