For Windows 10 and 11

See what changed on your disk.

An ultra fast disk space analyser that compares with last time. Scan today, scan again next week, and see exactly which folders grew, which shrank, what is new and what was deleted.

With a 15-day free trial, you have nothing to lose. Try it and see what you discover when you compare two scans of your disk.

The comparison tree: a new 58 GB game folder marked NEW, a 12 GB backup gone, with filters for increases, decreases, new and deleted

US $14.99, LITE US $5.99. One-time purchase, no subscription, price varies by country. 15-day trial. Never connects to the internet.

* LITE has the same scanner and reports, but no Scan History and no comparison. Compare the editions

Ultra fast

Probably the fastest scanner you will ever see. It goes through gigabytes in seconds and still catches the tiniest change.

Shows what changed

Other tools show you the biggest folders. Disk Space Manager keeps your recent scans of a drive and shows you what is different from last time, folder by folder and file by file.

Private by design

No account, no data collection, no connection to the internet. Buy it once on the Microsoft Store and it is yours.

Disk Space Manager at a glance

What it is
A disk space analyser (US: analyzer) for Windows that keeps your recent scans of a drive and shows what changed between them.
Runs on
Windows 10 version 1809 or later and Windows 11, 64-bit (x64). Installed and updated through the Microsoft Store.
Price
One-time purchase: US $14.99 for Disk Space Manager, US $5.99 for LITE. No subscription. Prices vary by country.
Trial
15 days on both editions, from the Microsoft Store.
Editions
Disk Space Manager and Disk Space Manager LITE. LITE has the same scanner and reports, but no Scan History and no comparison. Separate apps; one does not upgrade into the other.
Privacy
No account, no data collection, no telemetry. The app never connects to the internet. Scans stay on your PC.
Scans
Whole drives, folders, external disks and mapped network drives. Filters by folder and file name, saved under a name. Four reports with CSV export.
Language
English. More languages are being prepared for early 2027.
Made by
Prima Software Ltd, United Kingdom. On the Microsoft Store since 2018. Support: support@diskspacemanager.app.
A finished scan of drive D: every folder with its size, its share of the drive and the change since the previous scan

Ultra fast

A whole drive in seconds

Probably the fastest scanner you will ever see. Every folder with its size, its share of the drive and, in the FULL edition, the change since the last scan. Sort, filter, open a folder in File Explorer or delete right from the tree.

Scan History

A month of your drive on one chart

Each scan of a drive lands on the same chart, and the recent ones are kept: the last five by default, up to fifty if you choose. Pick any two and the totals, folder counts and file counts sit side by side, with the change between them.

Scan History: five scans of a drive on one chart, with the previous and selected scan side by side
Compare two scans: a summary of what grew, what shrank, what is new and what was deleted, with the totals

Detailed Comparison

What grew, what shrank, what is new, what is gone

Two scans side by side, each folder's change as a tree. Filter to only the new files, only the deleted ones, or only changes above a size you choose. Found the culprit? Open File Explorer right there.

Advanced Scan

Say exactly what to scan

A drive. The folders to leave out, by path or by name wherever they occur. The files to look for, and a line that takes one of them back out. Comments, so you remember why. Save it under a name and next month it is one click.

The Advanced Scan box with a six-line filter: a drive, two excluded folders, excluded folder names, the file types to look for and one file kept out, each line with a comment
A filtered scan for video and audio files: only the folders that hold them are listed

Filtered scans

Scan for just your videos, or just your photos

Tell it which files and folders to include or leave out. A scan for videos lists only the folders that hold one, with counts and reports of those files alone. Save the filter under a name and run it again with one click.

Four reports on every scan

Each opens on the scan you are looking at and exports to CSV. In the FULL edition each can be compared with the previous scan.

Largest Files report: the biggest files on the drive with their folders

Largest Files

The biggest files on the drive, with their folders.

Extension Categories report: space by kind of file

Extension Categories

Space by kind of file: video, images, archives, disk images. Add your own categories.

Extension Distribution report: space by file extension

Extension Distribution

Space by file extension, every extension on the drive.

Error report: the folders the scan could not read

Errors

The folders a scan could not read, and what to do about it.

Which edition?

Both are bought once on the Microsoft Store, with no subscription, and installed on every Windows PC you sign in to. They are separate apps: one does not upgrade into the other. Prices vary by country.

Feature
Disk Space Manager
US $14.99
once
LITE
US $5.99
once
Ultra fast scans of drives, folders and external disks✓✓
Largest Files, Extension Categories, Extension Distribution and Errors reports, CSV export✓✓
Advanced Scan: filters, excluded folders, saved scans✓✓
Your own extension categories✓✓
Scan History: your recent scans of a drive on one chart✓–
Detailed Comparison of any two scans, with filters✓–
Every report compared with the previous scan✓–
Free trial15 days15 days
Get it on Microsoft Store Get LITE on Microsoft Store

For teams and companies

Buying for more than one PC?

The Microsoft Store sells to one person at a time. If you need Disk Space Manager for a team, a department or a whole company, write to us with the number of PCs. We come back with a quote, an invoice, and the way to install it that suits you.

It never connects to the internet.

Not for updates, not for licences, not for telemetry. Updates come through the Microsoft Store like any other app. Your scans stay on your PC.

  • No account, no sign-in
  • No personal data collected
  • No subscription: one purchase, yours to keep
  • A problem report or a feature idea leaves from your own e-mail program, when you press Send
  • Read the privacy policy

Questions and answers

The short, plain answers. Anything else, write to us.

Is Disk Space Manager free?

No. It is a one-time purchase on the Microsoft Store: US $14.99 for Disk Space Manager and US $5.99 for Disk Space Manager LITE, prices vary by country. There is no subscription and nothing to pay later. Both editions have a 15-day trial, so you can try it on your own drives before you buy.

Which versions of Windows does it run on?

Windows 10 version 1809 or later, and Windows 11, on 64-bit (x64) PCs. It is installed and updated through the Microsoft Store like any other Store app. It does not run on macOS or Linux.

What is the difference between Disk Space Manager and Disk Space Manager LITE?

Both have the same ultra fast scanner, the Advanced Scan filters, saved scans and the four reports with CSV export. Only Disk Space Manager keeps a Scan History of your recent scans of a drive and compares any two of them: what grew, what shrank, what is new and what was deleted, folder by folder and file by file. They are separate apps on the Store; one does not upgrade into the other.

How is it different from WinDirStat, TreeSize or WizTree?

Those tools show you where the space is right now, usually as a tree or a treemap of the biggest folders. Disk Space Manager shows where the space is now too, and in addition keeps your recent scans and tells you what changed since the last one, which is usually the real question when a drive fills up. It has no treemap graphic: a scan is a tree with sizes, shares and changes, plus the four reports. It is a paid app with a 15-day trial.

Does it send any data anywhere?

No. The app never connects to the internet: not for updates, not for a licence check, not for telemetry. Updates come through the Microsoft Store. A problem report or a suggestion is composed in your own e-mail program and is sent only when you press Send there.

What does a scan read?

The folders and files you chose to scan: their names, sizes, dates and attributes. It does not read the contents of files. Everything a scan gathers stays on your PC, in the app's own data folder, and can be deleted from the app's settings.

Can it scan external drives and network drives?

Yes. A scan covers a whole drive or the folders you pick: internal drives, external disks, USB sticks, and mapped network drives that answer when the app lists them.

How many scans does it keep?

Disk Space Manager keeps the most recent scans of each drive or folder set: five by default, up to fifty if you choose. Older scan data is removed automatically, so the history itself never takes much space.

Can I delete files from the scan?

Yes. From a row in the scan tree you can open its folder in File Explorer, or delete the file or folder right there.

Can I buy it for a company or for several PCs?

A Microsoft Store purchase installs on the Windows PCs you sign in to with the same Microsoft account. For a team, a department or a company, write to support@diskspacemanager.app with the number of PCs, and you get a quote, an invoice, and a way to install it that suits you.

Which languages does it come in?

English. More languages are being prepared for early 2027.

Who makes it?

Prima Software Ltd, a one-developer company in the United Kingdom. Disk Space Manager has been on the Microsoft Store since 2018 and was rebuilt in 2026 on current technology. One developer reads every message to support@diskspacemanager.app and answers, usually within a day.

Write to us

A question before you buy, a problem, a feature you miss. One developer reads every message and answers, usually within a day.

From inside the app, Suggest a feature on the title bar opens an e-mail with the details already filled in. Nothing leaves your PC until you press Send.

Prefer your own mail program? Write to support@diskspacemanager.app.

Your name, address and message go to Prima Software Ltd by e-mail and nowhere else. See the privacy policy.

Correct our English

Tell us what reads wrong and how it should read. A word or a whole sentence, as you like.

Goes to Prima Software Ltd by e-mail and nowhere else.