Open Settings → System → Storage, or search a drive in File Explorer and sort by Size.
Step by Step
- Open Settings.
- Select System.
- Select Storage.
- Review categories such as Installed apps, Temporary files, Documents, Pictures, and Other.
- For individual files, open File Explorer and browse the drive or folder you want to check.
- Use Details view and sort by Size to find the largest files.
If That Doesn't Work
- Some system files should not be deleted manually.
- Temporary files can usually be reviewed safely through Settings → System → Storage → Temporary files.
- If a folder seems unusually large, inspect its contents before deleting anything.