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Vow Disk Space Analyzer
Visual disk space analyzer for Windows
C: drive full? See exactly why. Map it. Clean it. Safely.
Pick a drive and seconds later every gigabyte is on a map you can click through, biggest first. Find forgotten videos, old downloads, duplicates and bloated caches, then clear them with the Recycle Bin as your safety net. No ads, no account, no subscription.
- No ads
- No malware
- No account
- Light & dark theme
- Unlimited scans, the full map and every view, 3 one-click cleanups a day
No ads. Ever.No pop-ups, no banners, no "offers".
No malware or bundlewareThe installer installs one thing: this app.
No account, no uploadIt works on your PC, and your files stay there.
Free daily limits, just $4.95 unlimitedNo subscription. No trial that runs out.
The problem
"Low disk space" and no idea why
Windows tells you the drive is full, not what filled it. Clicking through folder properties one at a time could take all afternoon.
Full, but full of what?
Windows shows a red bar and a number. It never shows which folder ate 200 GB, or when it happened.
Folder by folder, by hand
Right-click, Properties, wait, repeat. Hunting for big folders one at a time is slow and easy to give up on.
Scareware "cleaners"
Free PC cleaners that flag thousands of "junk" items, then want a yearly subscription before they remove any of them.
Delete the wrong thing
Clean-up tools that wipe folders in one go, with no list to check first and no way back.
Bundled extras
Toolbars, browser changes and "optimisers" riding along with a free download you only wanted for five minutes.
Or a wall of numbers
Old-school analyzers give you a dense table of sizes and leave you to work out what is safe to remove.
Vow Disk Space Analyzer fixes all of it.
How it works
Scan. See. Free it up.
The whole drive as one picture in seconds, and the safe way to win space back right beside it.
- 01
Pick a drive
Every drive is a card with its used and free space. Click one, drop a folder on the window, or right-click a folder in Explorer and choose Analyze disk space.
Every drive shown as a card with its used and free space - 02
See where it went
Seconds later every folder and file is a block sized by the space it takes, coloured by type. Double-click to zoom in, right-click to open, show or delete.
- 03
Win the space back
Clean up lists temp files, browser and developer caches, old installers and untouched downloads. Review the list, click Clean, and your own files go to the Recycle Bin.
Find safe space to win back, with your files going to the Recycle Bin
Features
Every gigabyte accounted for
Fast enough for a full drive, clear enough for anyone, careful enough to trust with a delete button.
A whole drive in seconds
As administrator it reads the NTFS file table directly. Without admin rights, a parallel folder scan runs 2 to 4 times faster than Windows' own listing.
A map you can click through
A labelled treemap or a sunburst, coloured by file type or by age, with the free space and hidden system space shown on a drive's map.
Biggest files, types and ages
See the largest files, the space each file type and extension takes, and how much has not been touched in years.
Duplicates found
Identical copies are matched by size, then by their first and last 64 KB, then by their whole content. The oldest copy is kept.
What grew since last time
Each scan is remembered, so it can point to the exact folder that grew and chart each drive's used space over time.
Search with filters
Names, wildcards and filters such as ext:mp4, type:video, >1gb, older:2y and in:Downloads, across everything scanned.
Safe one-click cleanup
Temp files, browser and developer caches, crash dumps, the thumbnail cache, old installers and downloads, each with a list to review first.
Guard rails built in
Windows, Program Files, your profile folders and drive roots are refused. Update leftovers and the hibernation file get advice, not a delete.
Scheduled scans and alerts
A quiet daily or weekly scan that warns you when a drive runs low or grows fast, before it is full.
Export and command line
Export folders or files to CSV, save the map as a PNG, copy a text summary, or scan from the command line.
Light & dark theme
Easy on the eyes, day or night.
Disk Space Analyzer comes with a crisp light theme and a calm dark theme. Switch with one click, or let it follow your Windows setting by itself. It remembers your choice.
- LightClear and bright for daytime and busy offices
- DarkGentle on tired eyes late at night
- Follow WindowsChanges by itself when your PC does
Screenshots
See Vow Disk Space Analyzer in action
Real screenshots of the real app, in both of its themes: 5 light, 5 dark. Click any picture to see it full size.
Light theme
Dark theme
Who it's for
When your drive fills up
"Low disk space" warnings
Find out in seconds what filled C: and which folders are safe to shrink.
Gamers with full SSDs
See which games, mods and leftover installers take the most room before the next big download.
Photo and video collections
Spot the folders of old footage and duplicate copies filling up your storage drives.
Developers
Find bloated npm, NuGet, pip and Gradle caches and clear them in one click.
Small laptop drives
Make the most of a small SSD by finding the downloads and caches you forgot about.
IT and helpdesk
Scan a user's folder or a network share, export a CSV report, or run it from a USB stick with the portable version.
Compare
Vow Disk Space Analyzer vs the usual cleanup tools
What you usually get when you search for a way to free up disk space.
| Feature | Vow Disk Space Analyzer | Typical disk cleaners & analyzers |
|---|---|---|
| Price | Free every day, or $4.95 once | Yearly subscription to actually clean |
| Scanning and the full map | Free and unlimited | Sometimes limited in free versions |
| Visual map of every folder | Labelled treemap and sunburst | Often a list or a pie chart |
| Shows what is safe to delete | Grouped: safe, review first, Windows only | Rarely, or everything is "junk" |
| Your own files | Recycle Bin by default | Often deleted for good |
| What grew since the last scan | Yes, with history per drive | Rarely |
| Simulation (dry run) mode | Yes | Rarely |
| Ads, bundleware, inflated junk counts | None, ever | Common in free cleaners |
| Account or upload needed | Never: it all stays on your PC | Some want an account |
"Typical" describes what we found across the most-downloaded alternatives when we built Disk Space Analyzer. Your mileage with any one of them may vary; ours won't.
Pricing
Free every day. Just $4.95 once for the lot.
That is not a typo. Software this powerful usually means a monthly subscription; Disk Space Analyzer is $4.95, once, for life: it's almost a giveaway. Use it free for as long as you like, and unlock Unlimited only if you need more.
Free
$0forever
Unlimited scans, the full map and every view, 3 one-click cleanups a day.
- Scan any drive or folder, as often as you like
- The fast scan, the treemap and the sunburst
- Biggest files, types, ages, duplicates and search
- What changed since the last scan, CSV export
- Delete or recycle files by hand, no limit
- 3 one-click cleanups a day (resets at midnight)
Best valueUnlimited
$4.95USD, once. Yours for life.
Almost a giveaway. Less than a coffee for software this powerful: no subscription, no renewals, yours for life on 2 PCs.
Unlimited cleanups, Clean all safe items, all drives at once, scheduled scans.
- Unlimited one-click cleanups
- "Clean all safe items" in one click
- All drives at once: one map of your whole PC
- Scheduled scans with low-space and growth alerts
- One payment, yours for life on 2 PCs
- No subscription, no renewal, no expiry
How unlocking works
- 1Use it free first Install Vow Disk Space Analyzer and use it on your own files. No card, no account, no time limit.
- 2Click "Unlimited" in the app Pay $4.95 USD once by card, securely through Stripe in your browser.
- 3It unlocks itself Within seconds, for life, on up to 2 of your PCs. Your license key is emailed to you, and every future update is included.
Payments by Stripe: we never see or store your card. Questions? Ask a real person.
Clean software
Safe to install. Nothing else comes with it.
Most "free" Windows downloads pay for themselves with ads, bundled extras or your data. Vow Disk Space Analyzer doesn't need to: it's paid for honestly, once, by the people who find it useful.
Download Disk Space Analyzer free- No ads, toolbars or "offers"The installer installs one thing: Vow Disk Space Analyzer. No pre-ticked boxes to watch out for.
- No administrator rights neededIt installs just for you, in your own user folder, and leaves the rest of Windows alone.
- Nothing running in the backgroundNo startup programs, no tray nags, no services. When you close it, it's closed.
- Everything includedAll it needs is inside the installer, so you never have to fetch a "required component" from somewhere else.
- Uninstalls cleanlyOne click in Windows Settings > Apps. Your own files are never touched.
- A real company behind itMade, published and supported by XTO Pty Ltd, an Australian company, with real people answering every message.
Step-by-step guide
How to find what's taking up space on Windows
From a full C: drive to gigabytes back, without deleting anything you'll miss.
Step 1: get it freeInstall Vow Disk Space Analyzer free
Download it from this page and run the installer. It needs no administrator rights and no account, or you can run the portable version instead.
Click the drive that's full
Every drive shows its used and free space, and nearly full ones are flagged. Click one to scan it, or choose Scan a folder (Ctrl+O) for a single folder, USB stick or network share.
Read the map
Big blocks are big folders and files. Double-click to zoom in and Backspace to come back, and check Biggest files, Types and Age on the left for the full story.
Remove what you don't need
Right-click a block or a row and choose Recycle or Delete. The totals and the map update at once, with no rescan.
Run a cleanup
Open Clean up for temp files, caches, old installers and untouched downloads. Review each list, click Clean, and watch the free space come back.
Technical details
Disk Space Analyzer at a glance
- Works on
- Windows 10 (1809+) and Windows 11, 64-bit
- Scan engines
- NTFS file table (admin) or parallel folder scan
- Views
- Treemap, sunburst, tree, biggest files, types, ages, duplicates
- Measures
- Size on disk or file size; hard links counted once
- Exports
- CSV, PNG map, text summary, command line
- Internet
- Not needed: works fully offline
- Install
- Per-user, no administrator rights, no account
- Languages
- English
- Theme
- Light, dark or follow Windows: one click to switch
- Version
- 1.0.0, released 3 November 2026
- Publisher
- XTO Pty Ltd (Australia)
FAQ
Questions about Disk Space Analyzer
Is Vow Disk Space Analyzer free?
Yes. Scanning any drive or folder, the fast scan, the full map, every view, duplicates, search, CSV export and deleting files by hand are free with no limit, plus 3 one-click cleanups a day. Unlimited, a one-time $4.95 USD payment, adds unlimited cleanups, Clean all safe items, all drives at once and scheduled scans with alerts.
Why is my C: drive full?
Usually a handful of things: big videos or games, old downloads and installers, browser and developer caches, temp files, duplicate copies, and Windows' own hibernation file and update leftovers. The map shows which of these it is on your PC within seconds.
How fast is the scan?
As administrator, the fast scan reads the drive's NTFS file table directly, like WizTree. Without admin rights a parallel folder scan is used: in testing it read a full C: drive of 2.46 million files in 12 seconds.
Could it delete something important?
Not by accident. Scanning only reads. Your own files go to the Recycle Bin after a confirmation, Windows, Program Files, your profile folders and drive roots are refused, and Simulation mode shows what would be freed without touching anything.
How is it different from WizTree, WinDirStat or TreeSize?
It matches WizTree's file-table speed, has WinDirStat's treemap with labelled folder frames plus a sunburst, and TreeSize-style age analysis, duplicates and scheduled scans. On top it tracks what changed between scans, suggests safe one-click cleanups and shows free and hidden space on the map.
Does it need administrator rights?
No. It runs as you. Only the fast scan and cleaning Windows' own temp folders and crash dumps need administrator rights, and the app explains why before Windows asks.
Can it scan USB drives and network shares?
Yes. Any folder, USB stick or network share can be scanned, free and with no limit, and the results can be exported to CSV.
Is it safe to install?
Yes. It is made and published by XTO Pty Ltd, an Australian company. There are no ads, no bundled software and no account, it installs without administrator rights, and it uninstalls cleanly from Windows Settings, scheduled-scan task included.
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Done searching. Get Disk Space Analyzer.
See what's filling your drive, then win the space back safely. Free to use every day, $4.95 once if you ever want Unlimited.
- No ads
- No malware
- No account
- No subscription