Corbett
Corbett Disk Space Usage Analyzer scans your full PC, local drives or chosen folders and ranks every folder by size, file count and share of the drive. Forgotten videos, old installers and bloated mail files show up in a treemap in minutes. Try the free trial on a real drive first.
Download free demo Purchase now
Scans stay on your PC. Folder names and sizes never leave it.
Free trial and a 30 day refund window.
Lifetime licence from $29 Free trial shows the top 10 folders
Storage facts
Windows warns that the C drive is almost full, yet nothing obvious was added. Space hides in old video exports, installer folders, PST archives and copies nobody remembers. disk usage analyzer ranks every folder by size so the biggest culprits show up in seconds instead of an evening of clicking through File Explorer.
Results shown
6Scan areas
7Space hogs found
8Report only
4Check These When Your C Drive Stays Full
Hibernation and page files, a Windows.old folder after an upgrade and restore points hold large amounts of space. Clear system items through Windows Disk Cleanup and never delete them by hand.
Next steps live on the Duplicate Cleaner and Email Eraser Tool pages.
Core features
Four screens of Corbett, in working order.
Start
Open the analyzer and click Proceed. Scan settings appear straight away so you set nothing up first.
Download size is 3.8 MB and setup works on old and new Windows.
Scan area
Location to Scan lists My Computer, Local Drives and a custom choice of drives or folders. Press Search and the scan begins.
Select My Computer for the full picture or one folder for a quick check.
Scan progress
Progress appears while folders are measured. Large drives take a few minutes and the results fill in as soon as the pass ends.
Folders Windows blocks are noted as errors. Reload rescans and refreshes the figures after a cleanup.
Results
Results list every folder with its size in GB or MB, file count and space share so the heaviest items stand out at once. Treemap blocks draw the full drive.
Right click a file and choose Open File. disk usage analyzer only reports so you decide what to move. Copies filling the drive? Clear them with Duplicate Cleaner.
Space hogs
Big folders come from a short list of causes. Match your clutter to the list below.
Video exports
Large files from edits
Installers
Setup files left in Downloads
ISO images
Disk images kept after use
PST archives
Bloated mail files
Phone backups
Device copies on the PC
Old downloads
Files nobody opens
Cache folders
Temporary data that grows
Duplicate copies
Extra copies of the same file
Working process
Four steps take you from a full disk to a clear list of space hogs. Try them on one folder in the free trial first.
Install and start
Download Corbett and install it on Windows 11, 10, 8 or 7. Click Proceed to open the scan settings.
Choose the location
Select My Computer, Local Drives or specific drives and folders under Location to Scan.
Search and wait
Press Search. Progress shows while folders are measured and errors are noted for blocked items.
Review the sizes
Open the results to see folder sizes, file counts and the treemap. Right click a file to open it.
Found copies filling the drive? Open Duplicate Cleaner next.
Working process
Prefer text? Open the Disk analyzer steps guide for a full scan in pictures.
More options
Small options that make a big drive clear at a glance.
My Computer scan
Full picture of the PC
Chosen folders
Quick checks on one folder
Local drives
One drive at a time
Progress display
Shows how far the scan has reached
Sizes in GB and MB
Folder and file sizes
File counts
Files inside every folder
Space share
Space occupied indicator per folder
Treemap
Full drive as blocks
Error column
Blocked items listed, not hidden
Reload and rescan
Refresh after a cleanup
Open File
Right click a file to open it
Works offline
No internet needed for a scan
Free demo
Scan a Real Drive With Disk Space Usage Analyzer
Install the free trial and scan a drive you know. Your 10 heaviest folders appear with masked names, enough to see the scale of the problem.
Download free demoTry before you buy
Free trial of disk usage analyzer scans a real drive. Results list the top 10 folders with masked names.
| Feature | Free demo | Full version |
|---|---|---|
| Scan drives and folders | Yes | Yes |
| Folders listed | Top 10 folders | Every folder |
| Folder names | Masked | Shown |
| Subfolders of top 10 | Included | Included |
| Price | Free | From $29 one time |
Use cases
Anyone whose drive fills faster than the files they remember.
Full C drive owners
Windows warns that space is low and nothing obvious was added. Find the folder behind it.
Video editors
Exports and project files fill drives quickly. Rank the folders and move the old ones.
Office staff
Downloads, installers and old projects pile up in work folders.
Server admins
Corbett installs on Windows Server 2008 to 2019 and tracks storage on shared drives.
Mail archive owners
Spot oversized PST files that take gigabytes.
Careful cleaners
Report only so nothing is deleted while you decide what to move.
Why Corbett
Lifetime licence
From $29, one payment
Works on your PC
Folder names and sizes stay put
Treemap view
Full drive as blocks
File counts
Counted in every folder
Open File
Right click any file in the list
Error column
Blocked items listed, not hidden
Small install
3.8 MB download
30 day refund
Refund window after purchase
Before you scan
disk usage analyzer measures folders on Windows and reports. Here is what that includes and where it stops.
| Capability | Status | What it means |
|---|---|---|
| Scan areas | Yes | My Computer, Local Drives or chosen drives and folders |
| Results | Yes | Folder sizes, file counts, space share and a treemap |
| Blocked folders | Listed | Error column notes items Windows blocks |
| Deleting files | No | Analyzer only reports so you remove files yourself |
| System files | Disk Cleanup | Clear Windows system items through Windows Disk Cleanup |
| Mac and Linux | No | Corbett installs on Windows only |
Before purchase
Storage settings in Windows show broad categories like installed apps and temporary files at no cost. Compare that view with a folder scan in the rows below.
| Job | Windows Storage | disk usage analyzer |
|---|---|---|
| Cost | Built into Windows | $29 one time |
| Free space overview | Shown by category | Shown by folder |
| Biggest folders | Category view | Ranked by size |
| File counts | Not shown | Every folder |
| Treemap view | Not available | Built in |
| Temp file cleanup | Storage Sense | Use Disk Cleanup |
Windows Storage settings handle a quick look at free space and temp files. Folder level answers belong to the analyzer.
Specifications
Download details
System
Supported editions
Windows 11, 10, 8 and 7 in 32 bit or 64 bit, plus Windows Server 2008 to 2019. No macOS or Linux build.
Launch the setup with Run as Administrator from the right click menu.
Storage scan questions go to the developers of Corbett.
User testimonials
disk usage analyzer earns 493 reviews from buyers.
Collected across 493 reviews from software portals and the help desk. Three reviews below are unedited.
My storage space was constantly out of space and I don't know why. I use this tool to check my hard drive. I was shocked at how many unnecessary files are occupied in my disk. This is such helpful software that helps me solve my problem.
Before backing up my system, I use this tool to view the structure of my storage space. I am very impressed by how it accurately displays all the files and folders in my computer. Highly recommend it!
I like the visual layout of my drives that it creates. With this software I easily find my large files and unnecessary files which help me clean my internal storage space.
Before you scan
Three short steps give you a clean first scan.
Install with admin rights
Launch the setup with Run as Administrator from the right click menu.
Start with one folder
Choose Downloads or a project folder for a quick first scan. Move to My Computer once you trust the result.
Check OneDrive settings
Files set to always keep on this device count toward the drive. Note them before you scan.
Mail apps full too? See Gmail storage full after deleting emails and Thunderbird running slow.
Safety checks
Finding big files is quick. Four habits keep the cleanup safe.
Leave Windows folders alone
Files in Windows, Program Files and ProgramData keep the PC working. Use Disk Cleanup for system leftovers.
Free up OneDrive files
Set large cloud files to free up space on the PC instead of deleting them.
Move before deleting
Old projects and videos can still matter. Copy them to an external drive first, then remove them from the PC.
Rescan after cleanup
Click reload to refresh the figures and confirm the space came back.
Common questions
Corbett scans, filters, safety, trial limits and licence answers.
disk usage analyzer is Windows software from Corbett that scans a PC, drive or folder and ranks folders by size with file counts and a treemap.
Open Corbett, click Proceed, choose a scan location and press Search. Folders appear ranked by size when the scan ends.
No. Corbett only shows sizes. You decide what to move or remove afterwards.
Yes. Choose specific drives and folders as the scan location.
Recycle Bin contents, restore points, Windows.old and hibernation files hold space too. disk usage analyzer shows which folder grew.
Yes. Right click the file and choose Open File.
Yes. Every block stands for a folder or file, sized by the space it takes.
Yes. Reload rescans and updates the figures.
Yes. Corbett installs on Windows Server 2008 to 2019 and tracks storage on shared drives.
No. That figure is disk activity, not space. Corbett shows space used, which is a different problem.
Windows, Program Files, ProgramData and anything you do not recognise. Use Disk Cleanup for system leftovers.
No. disk usage analyzer scans local storage so a scan works offline.
No. Folder names and sizes stay on your PC.
No. Corbett installs on Windows 7 to 11 and Windows Server 2008 to 2019.
My Computer, Local Drives or specific drives and folders. Press Search after you choose.
Error column entries note folders Windows blocks so you know which items the scan cannot measure.
Free trial lists the 10 largest folders with masked names, including their subfolders.
Prices begin at $29. You pay once for a lifetime licence.
You receive the download link and the key by email after payment.
Download size is 3.8 MB. Keep 37.4 MB of free disk space, 2 GB of RAM and a Core 2 Duo 2.4 GHz processor. Launch the setup with Run as Administrator.
No. Files set to always keep on this device count toward the drive. Set them to free up space instead of deleting them.
Yes. Refund requests made within 30 days of purchase are accepted. See the refund policy for details.
Open the Disk Space Usage Analyzer guide for a full scan with screenshots.
Disk Space Usage Analyzer guides
Help for keeping drives and mailboxes lean.
Cleanup tools
File insight
Mail moves sit on the Email Migration Tool page and server jobs on the IMAP Migration Tool page. Mail formats go to the email converter tool, damaged mailbox data needs email recovery software and email viewer software opens saved mail free. See BKF File Recovery and Website Downloader.
Get started
Scan a real drive in the free trial, see the scale of the problem and buy when the numbers convince you. Your $29 licence is a single payment backed by a 30 day refund window.
Download free demo Purchase now
3.8 MB · Windows 11, 10, 8 and 7 · 30 day money back