How to Free Up Disk Space in Windows 11 Without Losing Files

Uninstall applications you no longer use 1-50 GB

Installed applications are almost always the single largest reclaim opportunity. Modern games can be 100 GB each. Adobe Creative Suite, Office, and development environments each take several gigabytes. Users typically have several apps installed they have not opened in months or longer.

1. Open Settings → Apps → Installed apps.
2. Sort by Size (largest first).
3. Review the top of the list. For each app you no longer use, click the three-dot menu and choose Uninstall.
4. For applications installed via installers (not from the Store), the uninstall may open the app’s own uninstaller — follow its prompts.

Move files to OneDrive with Files On-Demand 5-100 GB

OneDrive Files On-Demand makes files visible in File Explorer but keeps them stored in the cloud until you actually open one. Files show as available (cloud icon) but occupy no local disk space. This is one of the most efficient ways to free up disk space in Windows 11 without losing access to anything.

1. Ensure you are signed into OneDrive (Start → OneDrive).
2. Right-click the OneDrive icon in the taskbar and choose Settings.
3. Go to the Sync and backup tab.
4. Under Advanced settings, ensure Files On-Demand is enabled (Save space and download files as you use them).
5. In File Explorer, navigate to your OneDrive folder. Select files or folders you want to move to cloud-only.
6. Right-click and choose Free up space. The files remain visible but their local copies are removed.

Remove Windows.old and previous installation files 15-30 GB

Every time Windows 11 installs a feature update, it keeps the previous installation in a folder called Windows.old. This allows rolling back to the previous version within 10 days. After 10 days, Windows removes it automatically — but if you are confident the current version works, you can reclaim the space immediately.

1. Open Settings → System → Storage → Temporary files.
2. Wait for the calculation to complete.
3. Check the box next to Previous Windows installations (only appears if Windows.old exists).
4. Also check Windows Update Cleanup if listed.
5. Click Remove files and confirm.

Move Windows apps to another drive Variable

If you have a secondary drive (an HDD or a second SSD), many installed applications can be relocated without reinstalling. This does not delete anything — it moves the app files to another drive while keeping the app fully functional.

1. Open Settings → Apps → Installed apps.
2. Click the three-dot menu next to an app.
3. If Move is available (only some apps support it — mostly Store apps), click it.
4. Select the destination drive and click Move.
5. Repeat for other movable apps you want to relocate.

Change default save locations for new files Prevents future growth

If you have a secondary drive with more space, redirecting default save locations means new documents, downloads, music, and video files land there automatically — preserving C: drive space going forward.

1. Open Settings → System → Storage → Advanced storage settings.
2. Click Where new content is saved.
3. For each category (Documents, Music, Photos and videos, Movies and TV shows, Offline maps, Apps), select the target drive from the dropdown.
4. Click Apply after each change.

Compress Windows itself with Compact OS 2-6 GB

Compact OS is a Microsoft-designed feature that compresses Windows system binaries on the drive. Modern CPUs decompress the files on the fly with negligible performance impact. It is safe on any Windows 11 PC and fully reversible.

1. Press Win, type cmd, right-click Command Prompt, choose Run as administrator.
2. Check current status with: compact.exe /CompactOS:query
3. Enable compression with: compact.exe /CompactOS:always
4. Windows begins compressing in the background. It takes 10-30 minutes depending on the drive.
5. To reverse (if needed later): compact.exe /CompactOS:never

Reduce or disable the hibernation file 4-24 GB

The hibernation file (C:\hiberfil.sys) stores the contents of RAM when the PC hibernates. By default, it takes approximately 75% of your installed RAM — so a system with 16 GB of RAM has a 12 GB hibernation file. You have two options.

Option A — Reduce (recommended): Compress it to 40% of RAM while keeping hibernation and Fast Startup working.

1. Open Command Prompt as administrator.
2. Run: powercfg /h /size 40
3. The file shrinks to approximately 40% of installed RAM.

Option B — Disable completely: Removes the file entirely, freeing more space, but also disables Fast Startup and the ability to hibernate.

1. Open Command Prompt as administrator.
2. Run: powercfg /h off
3. The hiberfil.sys file is deleted. Hibernate option is removed from shutdown menus.
4. To re-enable: powercfg /h on

Manage System Restore points 1-15 GB

Windows creates system restore points automatically before major updates and installations. These accumulate over time and can consume significant space. Deleting old ones and limiting the space reserved for future ones reclaims disk space without disabling the feature.

1. Press Win + R, type sysdm.cpl, press Enter.
2. Click the System Protection tab.
3. Select your C: drive and click Configure.
4. Click Delete to remove all existing restore points (a new one will be created next time it is needed).
5. Adjust the Max Usage slider — 3-5% is usually sufficient for maintaining recent restore points.
6. Click OK.

Adjust Reserved Storage (advanced) 7-20 GB

Windows 11 sets aside 7-20 GB specifically to ensure feature updates can install successfully — a feature called Reserved Storage. Disabling it recovers that space but carries risk: future updates may fail with “not enough disk space” errors. Only do this if you actively maintain 40+ GB free space independently.

1. Press Win, type PowerShell, right-click and choose Run as administrator.
2. Check current status: DISM /Online /Get-ReservedStorageState
3. Disable Reserved Storage: DISM /Online /Set-ReservedStorageState /State:Disabled
4. You will see up to 20 GB become available in Storage settings.
5. To re-enable: DISM /Online /Set-ReservedStorageState /State:Enabled

Move user folders (Documents, Downloads, Pictures) to another drive Variable

If you have a secondary drive, moving the actual user folders — not just files — to that drive frees the C: drive while keeping everything working exactly as it did before. Windows treats the relocated folder identically.

1. Create a target folder on your secondary drive (e.g., D:\Documents).
2. Open File Explorer, right-click Documents (in the This PC section), and choose Properties.
3. Click the Location tab.
4. Click Move, browse to the target folder, and confirm.
5. Windows offers to move existing files — click Yes.
6. Repeat for Downloads, Pictures, Videos, Music as desired.

Remove unused language packs and features 200 MB – 2 GB

Windows 11 installs several language packs and optional features by default, some of which take significant space. Removing ones you do not need reclaims modest but meaningful space.

1. Open Settings → Time & language → Language & region.
2. Under Preferred languages, click the three dots next to any language you do not use → Remove.
3. Then go to Settings → Apps → Optional features.
4. Sort by size and review. Common removable items: Windows Fax and Scan, Handwriting recognition packs, XPS Viewer, Steps Recorder.
5. Select any you do not need and click Uninstall.

Enable Storage Sense for ongoing maintenance Prevents future issues

Storage Sense is the ongoing counterpart to manual cleanup — it prevents disk space issues from recurring by automatically clearing temp files, recycle bin contents, and OneDrive cloud-only files on a schedule.

1. Open Settings → System → Storage.
2. Turn on Storage Sense.
3. Click Storage Sense to configure.
4. Set Run Storage Sense to Every Week.
5. Set Delete files in my recycle bin if they have been there for over to 30 days.
6. Leave Delete files in my Downloads folder disabled unless you specifically want automatic Downloads cleanup.