How to find large files on PC (in under five minutes)

The short version: The fastest route is Everything: type size:>1gb, click the Size column, and you're looking at every giant file on every NTFS drive in about a second. File Explorer's size:>1GB search works without installing anything but crawls outside indexed folders; Settings → System → Storage shows category totals; UltraSearch and WizTree round out the toolkit. Then the part that matters: delete only files you created, and leave hiberfil.sys, pagefile.sys and WinSxS alone.

Method 1: File Explorer's size: filters

No installs needed — Explorer's search box understands size filters:

1. Open File Explorer at the folder or drive you want to check (e.g. This PC → C:).
2. In the search box, type size:>1GB. Any threshold works: size:>500MB, size:>4GB.
3. Or use the named bands: size:huge (1–4 GB) and size:gigantic (>4 GB).
4. When results finish, switch to Details view and click the Size column header to sort the biggest to the top.

The weakness is speed. Size lives in the file system, but Explorer still relies on the Windows Search index for fast answers — and most of C:\ isn't indexed. Outside indexed locations Explorer walks the directory tree file by file, so a whole-drive size: search can take ten minutes or more on a full disk, with the progress bar inching along. Fine for a one-off inside Documents; painful for a full-drive audit.

Method 2: Windows Storage settings

For a category-level view of where the space went:

1. Open Settings → System → Storage.
2. The bar chart breaks the drive into Apps, Temporary files, Documents, and so on. Click any category to drill in.
3. Click Temporary files to review safe bulk deletions — old Windows Update files, delivery optimization caches, the Downloads folder summary. We've routinely freed 10–30 GB here on machines that have been through a couple of Windows feature updates.
4. Under Cleanup recommendations, open Large or unused files for Windows' own list of personal-file space hogs.

Good for orientation and for cleaning Windows' own clutter; too coarse for tracking down specific files. That's what the next two methods are for.

Method 3: Everything — the instant, size-sorted list

This is the method we actually use. Everything (free, from voidtools) reads the NTFS master file table directly, so it already knows the name and size of every file on your drives without scanning them:

1. Install Everything from voidtools.com and let it build its index — under a minute even for our 1.2-million-file test library.
2. Type size:>1gb in the search bar. Results appear as fast as you type.
3. Click the Size column header to sort descending. You now have a live, instantly sortable list of every file over a gigabyte across all your NTFS drives.
4. Refine as needed: size:>1gb ext:mp4;mkv;iso isolates video and disc images, size:>1gb dm:prev5years..prev1year finds big files you haven't touched in ages, and size:>500mb c:\users\ limits the hunt to your profile.
5. Right-click any result → Open Path to inspect it in context before deciding its fate.

The catch: the MFT trick only works on local NTFS volumes, so exFAT USB sticks and network shares need a slower folder scan.

Method 4: UltraSearch and visual analyzers like WizTree

UltraSearch (free, JAM Software) uses the same MFT-reading approach as Everything but with no background service or persistent index — it reads the file table fresh each launch. It even ships a ready-made size filter: pick "Files larger than 100 MB" from the filter drop-down, sort by size, done. A good fit if you'd rather not keep a search tool running at all times.

Visual disk analyzers answer a slightly different question — not "which files are biggest" but "where did my space go". WizTree (free for personal use) is the standout: it MFT-scans a full drive in seconds and draws a treemap where every block's area is proportional to file size, so a forgotten 60 GB virtual machine image or a bloated cache folder jumps out visually. TreeSize-style folder trees do the same job in list form. Use an analyzer when the space has vanished into folders (thousands of medium files) rather than individual giants.

One more option for a single folder: if you just want to check Downloads or a project folder without installing anything, our free in-browser File Finder has a largest-files report — point it at a folder and it ranks the contents by size, entirely locally, nothing uploaded. For whole-drive audits, the desktop tools above are the right call.

All four of these tools and their trade-offs are ranked in our best file search software roundup.

What's safe to delete (and what isn't)

Your size-sorted list will mix harmless hoarding with files Windows needs. Sort them like this:

Generally safe (your own files)

• Videos, screen recordings, raw photo dumps you've already edited or backed up.
• Old installers and ISOs in Downloads — re-downloadable if ever needed.
• Finished archive files (.zip, .7z) whose contents you already extracted.
• Exact copies — if the same multi-gigabyte file shows up twice, confirm and clear it with our duplicate files guide rather than guessing which copy is canonical.

Leave these alone

• C:\hiberfil.sys — the hibernation file, often 6–13 GB. Don't delete it directly; if you never hibernate, disable hibernation properly with powercfg /h off in an admin terminal and Windows removes it itself.
• C:\pagefile.sys — virtual memory. Deleting or zeroing it to save space causes crashes and out-of-memory errors; let Windows manage it.
• C:\Windows\WinSxS — the component store, frequently 8–15 GB and a classic trap. Its size is partly hard links (it's smaller than it looks) and manually deleting from it can break Windows servicing. The only safe trim is Disk Cleanup → Clean up system files → Windows Update Cleanup or Dism /Online /Cleanup-Image /StartComponentCleanup.
• Anything in C:\Windows or Program Files generally — if you didn't put it there, don't delete it from a size list.

Move big media off the system drive

Half the giant files you find shouldn't be deleted — they're your video archive, photo library, game clips. The right move is literally a move:

1. Cold storage: shift finished projects and old media to an external drive. A portable SSD reads back fast enough to edit from directly — our picks are in the best external drives guide.
2. Always-on access for the whole house: a small NAS keeps the library reachable from every device, at the cost of setup time.
3. If the system drive is simply too small: at some point cleanup stops paying. A larger NVMe drive removes the problem for years — and makes every search and index in this guide faster too; see our SSD upgrade picks.

Whatever you choose, aim to keep 15–20% of the system drive free — NTFS performance and Windows Update both degrade on a nearly full disk.

Troubleshooting

Explorer's size: search hangs or crawls. Normal outside indexed locations — it's walking the tree manually. Use Everything or UltraSearch instead; the MFT approach is orders of magnitude faster for exactly this job.

The numbers don't add up — files found ≠ space used. Likely culprits: System Restore points and Volume Shadow Copies (check vssadmin list shadowstorage in an admin terminal), the hibernation and page files hidden from normal listings, or OneDrive placeholder files that look full-size but occupy almost nothing locally. A treemap like WizTree usually exposes the gap.

Huge files are hidden from results. Enable File Explorer → View → Show → Hidden items, and in Folder Options untick "Hide protected operating system files" temporarily (re-tick when done). Everything and UltraSearch show hidden files by default.

You freed gigabytes but free space barely moved. Empty the Recycle Bin — "deleted" files still occupy disk until then. If you used OneDrive's "Free up space" instead of deleting, the files were dehydrated to placeholders, which is the intended behavior.

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