How to Free Up Disk Space on Windows 11 (Without Deleting Anything Important)

First: find out what’s eating your space

Guessing is how people accidentally delete the wrong thing. The first time I cleaned a full drive, I went folder by folder like an archaeologist — and missed the 14 GB of stale update files sitting in plain sight. Windows 11 has a built-in storage map that shows exactly where your gigabytes went. Use it:

1. Open Settings > System > Storage.
2. Look at the colored bar at the top — it breaks your drive into categories: Apps & features, Temporary files, Documents, Pictures, Music, Videos, and Other.
3. Click into the two or three largest categories. Clicking Temporary files, for example, shows a detailed list with checkboxes and sizes — old update files, delivery optimization files, thumbnails, the Recycle Bin, and more.
4. Click Cleanup recommendations (back on the main Storage page) for Windows’ own prioritized list of safe-to-remove items, unused apps, and large files.

On most full drives, the story is always the same: Temporary files holding gigabytes of stale update data, a Videos or Pictures folder full of forgotten downloads, and a dozen apps installed once and never opened again. Now let’s clear each one properly.

Method 1: Let Windows clean itself (Storage Sense + Cleanup)

Start with the automated tools — they find space you’d never locate manually.

• Turn on Storage Sense. In Settings > System > Storage, toggle Storage Sense on, then click Configure Storage Sense or run it now. Set Run Storage Sense to Every week (or daily on a very full drive). Under Temporary Files, check “Delete temporary files that my apps aren’t using”. Under Automatically free up space, set OneDrive files to become online-only after 30 days of not being opened — this keeps the file listing on your PC while the actual data lives in the cloud.
• Run Cleanup recommendations. Click Cleanup recommendations and expand each section. Temporary files is the goldmine: Windows Update Cleanup alone is frequently 5–15 GB on systems that have been through a feature update, and Delivery Optimization Files can add several more. Check the boxes and click Clean up. These are files Windows has already finished using — removing them is completely safe.
• Empty the Recycle Bin properly. Files you “deleted” months ago are still sitting there taking up space. Right-click the Recycle Bin on the desktop and choose Empty Recycle Bin — or let Storage Sense do it on a schedule, which is the better long-term habit.

Method 2: Offload the big stuff (without losing access)

After cleanup, the next biggest category is almost always personal files — videos, photos, and installers sitting in Downloads. The goal isn’t to delete them; it’s to move them somewhere cheaper than your system drive.

• Audit your Downloads folder. Sort it by size (right-click > Sort by > Size). You’ll likely find old program installers, duplicate downloads, and video files you watched once. Delete the obvious junk, and move anything worth keeping to an external drive.
• Move media libraries off the system drive. Videos and photo collections are the classic space hogs. Move them to an external hard drive or a second internal drive, or upload them to OneDrive/Google Drive and use Free up space (right-click a file or folder in OneDrive > Free up space) to keep only cloud placeholders on the PC.
• Uninstall apps you don’t use. Go to Settings > Apps > Installed apps, sort by Size (large to small), and be honest with yourself about the games you finished two years ago and the three PDF readers. Click the three dots on an app and choose Uninstall. This is also where pre-installed manufacturer bloatware hides — and removing it feels great.
• Shrink hibernation and the page file (advanced). If you never use Hibernate, open an admin Terminal and run powercfg /hibernate off — this deletes the hiberfil.sys file, which is typically as large as 40% of your RAM (6+ GB on a 16 GB system). Only do this if you’re sure you don’t use hibernation.

Method 3: Deep-clean Windows’ hidden reserves

A couple of Windows’ own storage sinks are invisible on the Storage settings page but can hold serious gigabytes:

• Clean up the WinSxS component store. The C:\Windows\WinSxS folder grows with every update. Never delete it manually — instead, open an admin Terminal and run DISM /Online /Cleanup-Image /StartComponentCleanup. This safely removes superseded update components. On systems that have been through several feature updates, this reclaims 3–10 GB.
• Remove old restore points (keep the latest). System Protection snapshots accumulate over time. Search for Create a restore point, select your system drive, click Configure, and use Delete to remove all but the most recent restore point — or lower the Max Usage slider so they stop ballooning. Don’t turn System Protection off entirely; restore points are cheap insurance.
• Check the “Other” category. Back in Settings > System > Storage, the Other bucket sometimes hides forgotten user folders or massive app caches (video editors and games are repeat offenders). Click through it — anything you recognize as yours is fair game to move or delete.