See what ate
your disk space

Your C: drive lost 40 GB this month and no analyzer can tell you why — because they all answer the wrong question.

Other tools show you what is large.

DiskSpace shows you what became large.

Get it on Microsoft Store See how it works

After the first scans

A timeline, not a one-time snapshot.

Windows Update cache +6.1 GB

Developer cache +3.4 GB

Temp cleanup -1.2 GB

Browser cache +892 MB

Recycle Bin -640 MB

What changed on this PC last 30 days

Grew — took space Shrank — gave it back Barely moved

▲ C:\Users\you\AppData\Local\Docker\wsl\disk +22.4 GB

▼ C:\Windows\Temp −3.2 GB

Built around one question nobody else answers

“What changed?” — everything below exists to answer it well.

Δ

Time travel through your disk

Pick any two moments — yesterday and today, or today and six weeks ago — and get a complete list of what grew, shrank, appeared and vanished in between.

▲

Delta treemap

A treemap where tile size is the size of the change, not the folder. The thing that ate your disk is the biggest red block on screen. No hunting.

EN

Plain-English attribution

Changes are grouped into categories you recognise — Docker & WSL, Windows Update, Browser data, Games, Developer caches, Temp files — not raw paths you have to decode.

◷

Runs quietly, forever

Snapshots happen in the background at low I/O priority, skipping battery-saver and full-screen sessions. Idle CPU stays under 0.1% — a disk tool must never become the disk problem.

!

Growth alerts Premium

Get notified when a folder grows abnormally fast, or when your free space is trending toward zero — before you're staring at a full drive.

⤓

Export anything Premium

Any comparison or timeline exports to CSV or JSON, so you can chart it, share it with IT, or attach it to a ticket.

No account. No sign-in. No cloud. DiskSpace has no login screen because it doesn't need one — everything runs and stays on your PC. There is no server that could hold your data.

Free does the job. Premium goes deeper.

One-time purchase — no subscription. Buy through the Microsoft Store, or by card if you prefer.

Free

$0 / forever

The full “what changed” experience, on the drive that matters most.

✓3 days of history
✓Scan whenever you want, in one click
✓Your system drive (the one Windows runs from)
✓Browse 3 folder levels deep
✓Compare any two snapshots
✓Delta treemap & top movers
—Automatic background snapshots
—Your other drives
—Growth alerts
—CSV / JSON export

Download free

Premium

Save $45 — launch offer

~~$69.99~~$24.99 once

Buy once, keep it. No renewal, ever.

✓Everything in Free
✓Automatic snapshots — hourly to daily, and at every Windows start
✓Every drive on the machine
✓The whole folder tree, however deep
✓60 days of history
✓Growth alerts & free-space forecast
✓CSV / JSON export
✓Custom scan schedule
✓Unlimited live-watched folders
✓Snapshot notes (“installed Docker here”)

Get Premium in the Store Buy by card on polar.sh

Which one should I pick?

The Store is the simpler of the two. Pick the card option if you would rather not buy through it.

✓Store: follows your Microsoft account to every PC you own, and restores itself on reinstall
✓Store: no licence server involved — the app never phones home
✓Card: activate with your email and a one-time code; covers one PC at a time, and you can move it whenever you like
✓Card: the app checks your licence with us about once a day, and keeps working for 30 days offline
✓Either way: we never see or store your card details

Upgrading reveals history DiskSpace already recorded — your timeline gets deeper the moment you buy.

Prices shown in USD; your Store shows local pricing and tax. · Privacy · Terms · Refunds · FAQ · Support

See what ateyour disk space