How to Free Up Disk Space on Mac

Running low on storage space is one of the most common — and most frustrating — mac problems people encounter. A full drive doesn’t just prevent you from saving new files; it can slow down your entire system, block Windows updates from installing, and cause applications to behave unpredictably. The good news is that both Windows and Mac come with powerful built-in tools that can typically reclaim significant space in just a few minutes, without needing to install any third-party software.

In this guide, we’ll walk through exactly how to check what’s consuming your storage, use built-in cleanup tools on both Windows and Mac, manually track down large files and unused apps, and build habits that keep your drive from filling up again in the future.

Step 1: Check How Much Space You’re Actually Using

Before deleting anything, it helps to understand exactly what’s taking up room on your drive, since this tells you whether your problem is temporary junk files, large media, unused apps, or something else entirely.

On Windows

Press Windows + I to open Settings.
Go to System > Storage.
Windows will display a breakdown by category — Installed apps, System and reserved, Temporary files, Documents, Pictures, and more.
Click Show more categories for a fuller view of exactly what’s consuming space.

On Mac

Click Storage, then Manage (on newer macOS versions) for a detailed, categorized breakdown of what’s using your disk space.

A good general target is to keep your primary drive below about 80-85% full. Both performance and system updates tend to suffer when a drive gets too tight on remaining space.

Step 2: Use Windows Storage Sense (Windows 10/11)

Storage Sense is Windows’ built-in automatic cleanup tool, and it’s the single most effective first step for most users since it runs quietly in the background without requiring manual intervention.

Enabling Storage Sense

Open Settings (Windows + I) and go to System > Storage.
Find Storage Sense and toggle it On.
Click into Storage Sense settings to configure exactly how it behaves.

Configuring Storage Sense

Run frequency: Choose how often it runs — daily, weekly, monthly, or “during low free disk space,” which triggers cleanup automatically whenever your drive starts running low.
Temporary files: Enable automatic deletion of temporary files that apps aren’t currently using.
Recycle Bin: Set how many days deleted items sit in the Recycle Bin before being permanently removed.
Downloads folder: Optionally enable automatic cleanup of old files in your Downloads folder — this is off by default, and Storage Sense won’t touch your Downloads or OneDrive files unless you explicitly enable it.
Locally available cloud content: If you use OneDrive, this setting can free up space by making infrequently used files cloud-only rather than storing full local copies.

Running Storage Sense Immediately

If you don’t want to wait for the scheduled run, click Run Storage Sense now within its settings page to trigger an immediate cleanup. This process typically completes in under a minute and can reclaim several gigabytes right away, depending on how long it’s been since your last cleanup.

Step 3: Use Cleanup Recommendations (Windows 11)

Beneath Storage Sense in the Storage settings page, Windows 11 offers a dedicated Cleanup recommendations feature that scans your system and suggests specific files safe to remove.

Go to Settings > System > Storage.
Click Cleanup recommendations.
Windows will scan your system and group suggestions into categories like temporary files, unused apps, and large files you haven’t opened recently.
Review each category and select what you’d like to remove, then confirm to free up the space.

This tool is particularly useful because it identifies safe-to-remove items Windows has specifically flagged, reducing the guesswork involved in manual cleanup.

Step 4: Run the Classic Disk Cleanup Tool

For a deeper pass that can catch system files the newer Settings-based tools sometimes miss, the classic Disk Cleanup utility remains available and effective.

Select your main drive (usually C:) and click OK.
Wait for the scan to complete.
Check the boxes next to file categories you want to remove.
Click Clean up system files for additional options, including old Windows Update files and previous Windows installation backups, which can often free up significant space after a major OS upgrade.
Click OK to begin the cleanup process.

Step 5: Empty the Recycle Bin

This sounds obvious, but it’s a surprisingly common oversight: deleting files in File Explorer doesn’t actually reclaim space immediately. Deleted items sit in the Recycle Bin until you empty it, so if you’ve been deleting files without seeing your free space grow, this is almost always the reason.

Right-click the Recycle Bin icon on your desktop and select Empty Recycle Bin to permanently remove everything and reclaim the associated space.

Step 6: Uninstall Unused Applications

Programs you no longer use can quietly hold onto significant disk space, sometimes for years without you noticing.

Open Settings > Apps > Installed apps.
Review your program list, sorted by size if available.
Click the three-dot menu next to any unused program and select Uninstall.
Pay particular attention to games (which often take 50GB or more) and media software (typically 10-20GB each), since these tend to be the biggest offenders.

A good habit is reviewing your installed programs every few months and removing anything you haven’t opened in the last six months.

Step 7: Disable Hibernation (Advanced)

Open Start, search for Command Prompt or PowerShell, right-click the top result, and select Run as administrator.
Type the following command and press Enter.
This immediately frees the space previously reserved for the hibernation file.

Only disable this if you don’t rely on Hibernate mode specifically (as opposed to Sleep mode, which works differently and isn’t affected by this change).

Step 8: Move or Delete Large Media Files

Videos, music, and photo libraries are usually the heaviest individual items on a system drive. To track these down:

Within the Storage breakdown in Settings, click into categories like Videos or Pictures to see exactly what’s using the most space.
Consider moving large media files to an external hard drive, a secondary internal drive, or a cloud storage service if you don’t need them immediately accessible.
For photo libraries specifically, services like OneDrive, Google Photos, or iCloud Photos can store your library in the cloud while keeping only smaller, optimized versions locally.

Step 9: Clear Your Browser Cache and Downloads

Web browsers accumulate cached files, cookies, and browsing history over time, and heavy browser use — especially across multiple browsers installed simultaneously — can quietly consume several gigabytes without you noticing.

In most browsers, go to Settings > Privacy and security > Clear browsing data.
Select Cached images and files, and optionally cookies and browsing history if you’re comfortable clearing those as well.
Choose your time range (clearing everything from “All time” recovers the most space) and confirm.

Don’t forget your Downloads folder either — this is one of the most commonly overlooked sources of accumulated clutter, since files downloaded for one-time use (installers, PDFs, email attachments) tend to pile up indefinitely unless manually reviewed.

Freeing Up Space on a Mac

Mac users have similarly effective built-in tools, accessible through a slightly different path.

Step 1: Review the Storage Management Window

macOS will display categorized recommendations, often including:
- Store in iCloud: Automatically offloads infrequently accessed files, photos, and messages to iCloud while keeping them accessible.
- Optimize Storage: Automatically removes watched movies and TV shows from Apple TV app content you’ve already streamed.
- Empty Trash Automatically: Permanently deletes items in Trash after 30 days rather than letting them accumulate indefinitely.
- Reduce Clutter: Shows large files and downloads you may have forgotten about, letting you review and delete them directly.

Step 2: Clear Application and System Caches

Applications and system processes accumulate cache files over time that can be safely cleared without affecting your actual data. Third-party utilities or careful manual review of ~/Library/Caches can help identify and remove these, though this should be done cautiously to avoid deleting files applications actively depend on.

Step 3: Uninstall Unused Applications

Drag unused apps from your Applications folder to the Trash, then empty the Trash to reclaim the space. For a more thorough removal that also clears associated support files, consider using the storage management window’s built-in application review feature.

Tips

Schedule Storage Sense or macOS’s automatic cleanup to run regularly rather than only cleaning up manually when you hit a storage wall.
Use cloud storage strategically for large, infrequently accessed files like old photos, videos, and archived documents, keeping only what you actively need stored locally.
Review your installed apps and browser extensions periodically. It’s easy to accumulate software you tried once and forgot about, and these add up over months and years.
Clear your browser cache and downloads folder regularly, since these are often overlooked sources of accumulated clutter, particularly for users who download files frequently for work or research.
Consider upgrading your storage if you’re consistently near capacity. If you’re regularly running cleanup tools just to stay functional, an external drive or a larger internal SSD may be a more sustainable long-term solution than ongoing manual maintenance.
Set a recurring calendar reminder for a deeper manual review. While automated tools handle routine cleanup well, a quarterly check of your largest files and installed applications catches things automation tends to miss, like duplicate downloads or forgotten project files.

Common Mistakes and Troubleshooting

I deleted files but my free space didn’t increase Check whether those files are still sitting in your Recycle Bin (Windows) or Trash (Mac) — deletion doesn’t reclaim space until these are emptied.
Storage Sense isn’t running automatically Confirm it’s actually toggled on in Settings, and check your configured run frequency, since it may be set to only trigger during low disk space rather than on a regular schedule.
My drive is full but I can’t find what’s using the space Use the categorized Storage breakdown (Settings > System > Storage on Windows, or About This Mac > Storage on Mac) rather than manually browsing folders, since system and hidden files often account for significant space that isn’t obvious through normal file browsing.
Uninstalling a large program didn’t free as much space as expected Some applications leave behind residual files, caches, or user data in separate locations even after uninstalling. Checking your AppData folder (Windows) or Application Support folder (Mac) for leftover folders related to the uninstalled program can recover additional space.
I’m worried Storage Sense or cleanup tools might delete something important By default, these tools are designed conservatively and won’t touch your Downloads folder, cloud files, or anything marked to always keep on your device unless you specifically enable those options. Review the settings carefully before enabling more aggressive cleanup behaviors.

Conclusion

Freeing up disk space doesn’t require third-party software or advanced technical knowledge for most users — both Windows and macOS include genuinely capable built-in tools that can typically reclaim 10-30GB in just a few minutes. Start with the automated options like Storage Sense or macOS’s Optimize Storage recommendations, then work through manual steps like uninstalling unused apps, emptying your Recycle Bin or Trash, and relocating large media files if you need additional space.

Beyond a one-time cleanup, building small ongoing habits — scheduling automatic cleanup tools, reviewing installed apps periodically, and using cloud storage strategically for infrequently accessed files — will keep your drive from creeping back toward full capacity in the months ahead.

Frequently Asked Questions (FAQs)

1. Is it safe to use Storage Sense or Cleanup Recommendations without reviewing what gets deleted?

Generally, yes. These tools are designed to only target genuinely safe-to-remove items like temporary files and old Recycle Bin contents by default. However, reviewing the specific settings before enabling more aggressive options (like Downloads folder cleanup) is a good habit for extra peace of mind.

2. How much disk space should I expect to free up using these methods?

Most users can reclaim between 10-30GB using built-in tools alone, though this varies significantly based on how long it’s been since your last cleanup and how much temporary or cached data has accumulated.

3. Should I buy a bigger hard drive or SSD instead of cleaning up regularly?

If you find yourself needing to run cleanup tools frequently just to stay functional, upgrading your storage — whether through a larger internal drive or an affordable external drive — is often a more sustainable long-term solution.

4. Do registry cleaners help free up disk space?

Not meaningfully, and Microsoft specifically recommends against using registry cleaners, since they can delete critical system keys and cause instability without providing significant storage benefits. Stick to the built-in tools covered in this guide instead.

5. Will disabling Hibernate affect my computer’s performance?

No, disabling Hibernate simply removes the option to use that specific power-saving mode. Sleep mode, which most users rely on day-to-day, works differently and continues functioning normally after Hibernate is disabled.

6. How often should I run disk cleanup tools?

Enabling automatic tools like Storage Sense to run weekly or monthly is generally sufficient for most users, supplemented by a manual review of installed apps and large files every few months.

7. Can freeing up disk space improve my computer’s overall performance?

Yes, particularly if your drive was previously very close to full capacity. Both Windows and macOS rely on a certain amount of free space for virtual memory and temporary system operations, so a chronically full drive can noticeably slow down overall performance and even block system updates from installing.

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