How To Check What's Taking Up Storage On Your PC

Running low on disk space is one of those problems that sneaks up on you. One day everything's fine, the next Windows is throwing low-storage warnings and your PC is sluggish. Before you start deleting files at random or buying a new drive, it helps to actually see what's eating your storage — and Windows gives you several ways to do exactly that.

Why Storage Fills Up Faster Than You Expect

Modern systems accumulate data from multiple directions at once. App installations, Windows Update caches, browser downloads, temporary files, system restore points, and hibernation files all claim space quietly in the background. On top of that, games and creative software have grown dramatically in size — a single AAA game can occupy 100GB or more, and video editing projects routinely run into hundreds of gigabytes.

Understanding where your space went is different from knowing how much space you have left. The goal here is the former.

Method 1: Windows Storage Settings (Built-In, No Download Required)

The quickest starting point is built directly into Windows 10 and Windows 11.

How to get there:

1. Open Settings (Windows key + I)
2. Go to System → Storage

You'll see a visual breakdown of your main drive, split into categories: Apps & Features, Temporary Files, Documents, Videos, Music, Other, and more. Clicking any category drills down further and shows you specific folders or apps contributing to that usage.

This view is especially useful for spotting Temporary Files — a category that often holds gigabytes of Windows Update leftovers, Recycle Bin contents, and cached data that's safe to remove.

Storage Sense, also found here, can be configured to clean up temporary files automatically on a schedule — useful if you want ongoing maintenance rather than a one-time fix.

Method 2: File Explorer — Checking Individual Drives and Folders

For a more hands-on look, File Explorer shows you folder-by-folder what's consuming space.

• Right-click any drive in This PC and select Properties to see total used vs. available space.
• Right-click individual folders and select Properties to see the size of everything inside.

This method is slower than purpose-built tools but requires no additional software and gives you direct access to the files themselves. It works well if you already have a rough idea of which folders to investigate — Downloads, Desktop, and Documents are common culprits.

Method 3: Disk Usage Analyzer Tools 💾

For a more visual and complete picture, third-party disk analyzers map your entire drive as a treemap or sunburst chart, where the size of each block represents how much space a folder or file consumes. This makes it immediately obvious which directories are the real offenders.

WinDirStat and TreeSize Free are two widely used options in this category. Both scan your drive and present the results in a way that's far more intuitive than navigating File Explorer manually. SpaceSniffer is another option with a similar visual approach.

These tools are particularly good at surfacing surprises — oversized log files, forgotten virtual machine images, or large archived folders buried several levels deep in a directory tree.

Method 4: Apps & Features — Finding Large Installed Programs

Sometimes the biggest consumers aren't files you created — they're applications you installed and forgot about.

Settings → Apps → Apps & Features (Windows 10/11) lists all installed programs with their size. You can sort by size to see which applications are the heaviest. Games, creative suites, and development environments (like Visual Studio or Android Studio) frequently appear at the top of this list.

This view won't show you everything — some system components and certain legacy apps don't report accurate sizes here — but it's a solid first pass before uninstalling anything.

Method 5: The Command Prompt for Power Users

If you prefer a no-frills approach or need to analyze storage on a remote or restricted system, the Command Prompt offers some useful options.

Running dir /s inside a folder shows the total size of its contents. The built-in Disk Cleanup tool (cleanmgr) provides a category-based breakdown of removable files, including system files when run with administrator privileges.

For more advanced users, PowerShell can generate detailed reports on folder sizes, which is particularly useful in managed IT environments.

What the Breakdown Usually Reveals 🔍

In practice, the biggest storage consumers tend to fall into a few predictable categories:

• Windows system files — including WinSxS (component store), hibernation files (hiberfil.sys), and virtual memory (pagefile.sys)
• Downloaded and installed applications — especially games, media software, and developer tools
• User-generated content — videos, photos, and project files in personal folders
• Cached and temporary data — browser caches, Windows Update residuals, app temp files
• Backup and restore data — System Restore snapshots and File History backups

The split between these categories varies significantly depending on how the machine is used. A gaming PC looks completely different from a work laptop or a creative workstation.

The Variable That Changes Everything

The methods above are consistent — they work on any modern Windows PC. But what you find when you run them, and what you choose to do about it, depends entirely on your situation.

A large WinSxS folder might be untouchable on a managed work machine but safely reducible on a personal system. Hibernation files can be disabled on a desktop but are genuinely useful on a laptop. Game libraries that look wasteful to one person are non-negotiable to another.

Knowing what's taking up space is the first step. What comes after that depends on which files are yours to move, delete, or archive — and that's a question only your own setup can answer.