How to Find What's Taking Up Disk Space in Windows 10 & 11
Identify Large Folders, Duplicate Files and Hidden Space Hogs on Your Hard Drive or SSD
A full hard drive slows Windows down and prevents updates from installing. Before you start deleting things blindly, it pays to find out exactly where space has gone. This guide walks through every built-in Windows method — plus a dedicated tool for serious analysis.
On Windows 10 and 11, open Settings → System → Storage. Windows displays a breakdown by category — Apps & features, Temporary files, Documents, Pictures, and more. Click any category to drill into it and see what's consuming space within that group.
This gives a quick overview of where space is going at a high level, but it doesn't show individual folder sizes or pinpoint the single biggest offenders on your drive.
Open File Explorer → This PC, then right-click a drive and choose Properties to see how much space is used versus free. Inside File Explorer you can switch to Details view and click the Size column header to sort files by size — this helps surface large individual files quickly.
The key limitation: File Explorer does not recurse into subfolders to sum their total sizes. You see the sizes of individual files, not the combined size of a folder and everything inside it. This makes it difficult to identify which top-level folders are the real space consumers.
Storage Sense is Windows' built-in automatic cleanup tool. Access it via Settings → System → Storage → Storage Sense. You can configure it to:
- Delete temporary files left by apps
- Empty the Recycle Bin automatically after a set number of days
- Clear files in the Downloads folder that haven't been opened in a while
- Remove locally cached cloud files you haven't used recently (OneDrive)
Storage Sense is good for routine maintenance and keeping temporary clutter under control. It won't help you find where large custom data files, game libraries, or project folders are stored.
Search for Disk Cleanup in the Start menu, select the drive to clean, then check the categories you want to remove — Temporary Internet Files, Windows Error Reporting, Delivery Optimization Files, and more.
For additional options, click Clean up system files inside the Disk Cleanup window. This unlocks extra categories including old Windows installations left behind after an upgrade, which can be several gigabytes in size. Run this elevated (as administrator) for best results.
Certain locations on a Windows system are well-known sources of large or unnecessary files. The table below lists the most common ones, what they contain, and whether they are safe to remove.
| Location | What it contains | Typical size | Safe to delete? |
|---|---|---|---|
| C:\Users\[Name]\AppData\Local\Temp | Temporary files left by apps | 0–10 GB | Yes — files in use by running apps will be skipped automatically |
| C:\Windows\Temp | System temporary files | 0–5 GB | Yes — close open applications first |
| C:\Windows\SoftwareDistribution\Download | Windows Update cache files | 1–10 GB | Yes, after updates have finished installing |
| C:\hiberfil.sys | Hibernation file (roughly 40% of installed RAM) | 4–32 GB | Only if you don't use hibernate — disable via powercfg /h off |
| C:\pagefile.sys | Virtual memory paging file | 4–16 GB | No — managed by Windows; do not delete manually |
| C:\Users\[Name]\Downloads | Downloaded files | Varies | Review manually — many are safe to remove but check first |
| Recycle Bin | Deleted files awaiting permanent removal | Varies | Yes — right-click Recycle Bin and choose Empty Recycle Bin |
Significant amounts of disk space can be hidden in locations that aren't immediately obvious. Common sources include:
- Game installations — Steam libraries default to
C:\Program Files (x86)\Steam\steamappsand individual games can be 50–150 GB each - Virtual machine disk images —
.vmdk,.vhd, and.vhdxfiles for VMware or Hyper-VMs can be tens of gigabytes - Old system restore points — accumulate silently over time; manageable via Disk Cleanup → System files
- iOS and Android backups — created by iTunes and smartphone sync software in AppData folders
- Docker images and containers — stored under
C:\ProgramData\DockerDesktop - WSL virtual disk — the Windows Subsystem for Linux stores a virtual disk that can grow to many gigabytes
Tip: File Explorer hides protected system files by default. To see everything, go to View → Options → Change folder and search options, then on the View tab enable Show hidden files, folders, and drives and disable Hide protected operating system files.
Built-in Windows tools can't show you a visual map of where every gigabyte went. A dedicated disk analyser solves this by scanning your entire drive and presenting folder sizes as a sorted list or interactive map — so you can see at a glance which folders are consuming the most space, regardless of how deeply nested they are.
Disk Recon visualises folder sizes across your entire drive, finds the biggest consumers in seconds, and includes a duplicate file finder to recover space without manually comparing files one by one.
Disk Recon maps every folder on your drive by size, highlights space hogs and finds duplicate files — so you know exactly what to remove.
Learn About Disk Recon →- How to Find and Remove Duplicate Files in Windows — Content-based duplicate detection explained
- Disk Recon — Advanced disk space manager with folder analysis and duplicate finder