How to Find Large Files on Windows

Why File Explorer Falls Short

File Explorer can sort files by size within a single folder, but only that folder. There's no built-in way to search your entire drive for the largest files and get a ranked list. For most users, this makes tracking down large hidden files a frustrating, manual process.

Using Windows Search (Limited)

Windows Search supports a size filter: open File Explorer, navigate to This PC, and type size:>500MB in the search box. This surfaces files larger than 500 MB — but it's slow, doesn't show folder sizes, and often misses files in protected system directories. Or skip the search box entirely and see every large file laid out visually in LumaDisk's sunburst view of your drive (covered below).

Using PowerShell

For a more comprehensive search, open PowerShell as administrator and run:

Get-ChildItem C:\ -Recurse -ErrorAction SilentlyContinue | Where-Object { $_.Length -gt 500MB } | Sort-Object Length -Descending | Select-Object FullName, @{ N="Size(GB)"; E={ [math]::Round($_.Length/1GB,2) } } | Format-Table -AutoSize

This lists all files larger than 500 MB, sorted by size. It works, but it takes several minutes to run, doesn't show folder-level totals, and requires comfort with the command line.

Using a Disk Space Visualizer

The fastest and most practical method is a dedicated disk space analyzer. LumaDisk, available today on the Microsoft Store, renders your entire drive as an interactive sunburst chart — large files appear as the biggest wedges, immediately visible without any searching.

You can click any wedge to see what it contains, drill into folders with a breadcrumb trail, and reveal a file in File Explorer or send it to the Recycle Bin without leaving the app. It also shows folder sizes — something neither File Explorer nor PowerShell does cleanly. What would take 10–20 minutes of searching takes under a minute.

What to Do Once You Find Large Files

Before deleting, consider each file:

• Identify it first. Some large files are system files Windows needs — hiberfil.sys (hibernate), pagefile.sys (virtual memory), and files in C:\Windows\WinSxS\ should not be deleted manually. Use Disk Cleanup to handle those safely.
• Move before deleting. Large media files, project archives, and old backups are often better moved to an external drive than permanently deleted.
• Check for duplicates. ISO files, video exports, and setup installers are common duplicates — you may have the same content in multiple places.

LumaDisk shows you the full path and file size before you delete anything, so you're never removing something blindly.