The fastest ways to reclaim gigabytes on Windows or Mac

Your PC runs slower and warns you about low disk space when the drive fills up. The quickest fixes are deleting old files you do not use, clearing your browser cache, and uninstalling programs you no longer need. Most people can recover 10 to 50 gigabytes in an afternoon without buying anything or moving files to the cloud.

Where you look depends on what is taking up space. Large video or photo files live in your Downloads or Documents folders. Old Windows updates and temporary files hide in system directories. Installed programs you forgot about sit in your Program Files folder. Each source needs a different approach, and some deletions are safer than others.

Key Takeaways

  • Empty your Recycle Bin or Trash after deleting files, because deleted files still occupy space until the bin is emptied.
  • Uninstall programs through Control Panel (Windows) or Applications folder (Mac) rather than dragging them to trash, because installers remove all related files.
  • Clear your browser cache in Chrome, Firefox, or Edge settings to recover several gigabytes without losing passwords or bookmarks.
  • Check your Downloads folder for old installers and files you downloaded months ago but never opened.
  • Use built-in storage tools — Storage Sense on Windows 11 or About This Mac on macOS — to see exactly which folders are largest.

Check what is using the most space

Before you delete anything, find out where your space is going. On Windows 11, open Settings, go to System, then Storage. The screen shows a bar graph of what is using space and lists the largest folders and file types. Click on any category to drill down — for example, clicking "Apps & features" shows installed programs sorted by size.

On macOS, click the Apple menu, choose About This Mac, then Storage. A colored bar shows what is using space. Click Manage to see a breakdown by category. Both tools let you see the problem before you act, so you do not delete something important by accident.

If you want more detail, right-click any folder on Windows and choose Properties to see its total size. On Mac, select a folder and press Command+I. This tells you whether a single folder is the culprit or whether space is scattered across many small files.

Delete files from Downloads and Documents

Your Downloads folder often holds installers, old email attachments, and files you opened once and forgot about. Open it, sort by date modified, and delete anything older than six months that you do not recognize. Installers for programs you already have installed are safe to delete — the program itself lives elsewhere and will not be affected.

Check Documents, Pictures, and Videos the same way. Look for duplicate photos, old versions of documents, and video files you no longer need. If you are unsure whether you need something, move it to a folder called "Old Files" first rather than deleting it outright. After a month, if you have not opened that folder, delete it.

After you delete files, empty the Recycle Bin on Windows or Trash on Mac. Deleted files still take up space until the bin is emptied. Right-click the Recycle Bin and choose Empty Recycle Bin, or on Mac, click Finder, then Empty Trash.

Uninstall programs you do not use

Installed programs take up space and slow your startup time. On Windows, open Control Panel, go to Programs, then Programs and Features. Sort by size to see which programs use the most space. Click any program and choose Uninstall. Do not just delete the program folder — using the uninstaller removes related files and registry entries that dragging to trash leaves behind.

On Mac, open Finder, go to Applications, and drag unused programs to Trash. Some Mac programs come with an uninstaller — double-click it if one exists in the program's folder. Then empty Trash.

Common space hogs include old versions of Office, Adobe Creative Suite, games, and antivirus software you replaced with something else. If you are not sure what a program does, search its name online before uninstalling. You can always reinstall it later if you need it.

Clear browser cache and temporary files

Your web browser stores copies of websites you visit so they load faster next time. Over months or years, this cache grows to several gigabytes. On Chrome, Firefox, or Edge, press Ctrl+Shift+Delete (Windows) or Command+Shift+Delete (Mac) to open the Clear Browsing Data window. Set the time range to "All time," check Cached Images and Files, and click Clear Data. This does not delete your passwords, bookmarks, or browsing history unless you also check those boxes.

Windows also stores temporary files in a system folder. On Windows 11, go to Settings, System, Storage, and click Temporary Files. Check the boxes for Temporary Files and Recycle Bin, then click Remove Files. This is safe — Windows creates new temporary files as needed.

On Mac, temporary files are harder to access safely. The simplest approach is to restart your Mac, which clears many temporary files automatically. If you want to dig deeper, third-party tools like CleanMyMac X or Disk Diag can show and remove old cache files, but the built-in approach is usually enough.

Move large files to external storage or cloud backup

If you have video projects, large photo libraries, or archived documents you need to keep but do not use often, move them to an external hard drive or cloud storage. A 1 or 2 terabyte external drive costs $50 to $100 and holds far more than most internal drives. Plug it in, copy your large folders to it, then delete the originals from your PC.

Cloud services like OneDrive (Windows), iCloud (Mac), Google Drive, or Dropbox let you store files online and access them from any device. Free plans offer 5 to 15 gigabytes. Paid plans start at $2 to $10 per month for 100 gigabytes to 2 terabytes. The advantage is that you can access files from your phone or another computer, and your files are backed up if your PC fails.

Do not move your entire user folder or system files to external storage — keep your operating system and active programs on your internal drive. Move only files you created: photos, videos, documents, and project folders.

Use Storage Sense to automate cleanup

Windows 11 includes Storage Sense, a tool that automatically deletes temporary files and empties the Recycle Bin on a schedule. Open Settings, go to System, then Storage, and toggle Storage Sense on. You can set it to run daily, weekly, or monthly. You can also tell it to delete files in your Downloads folder that have not been opened in a certain number of days.

Storage Sense does not delete your personal files — it only removes temporary files, cache, and old downloads. You can customize what it deletes by clicking the dropdown menu next to Storage Sense and choosing what to clean up automatically.

macOS does not have an equivalent built-in tool, but restarting your Mac regularly clears temporary files. You can also enable iCloud Photos to move your photo library to cloud storage, which frees up gigabytes on your internal drive while keeping your photos accessible.

Frequently Asked Questions

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

Yes. The temp folder holds files that programs create while running but no longer need. Windows creates new temp files as needed. You can safely delete everything in C:\Users\[Your Username]\AppData\Local\Temp. If a program is using a temp file, Windows will not let you delete it.

What happens if I uninstall a program and then need it again?

You can reinstall it from the original installer or read it again from the publisher's website. Your personal files are not affected — uninstalling only removes the program itself and its settings. If you are unsure, move the program to a folder called "Old Programs" first, then delete it after a month if you have not needed it.

Can I delete Windows update files to free up space?

Windows 11 lets you delete old update files through Storage Sense without breaking your system. Open Settings, System, Storage, Temporary Files, and check Previous Windows Installation(s). This removes files from older Windows versions but keeps your current installation intact. Do not manually delete files from the Windows folder.

How much space should I keep free on my PC?

Keep at least 10 to 15 percent of your drive free for Windows to run smoothly and create temporary files. If your drive is 500 gigabytes, aim to use no more than 425 gigabytes. If you regularly work with large video or photo files, keep 20 to 25 percent free.

Should I buy a larger internal drive or use external storage?

External storage is cheaper and faster to set up — a 2 terabyte drive costs $50 to $100. A new internal drive requires opening your PC or paying for installation. Use external storage for files you do not access often. If you work with large files daily, a larger internal drive or a fast external SSD (solid-state drive) is worth the investment.