Scan one drive or all drives
Scan one drive or use Scan All for every connected drive. A folder scan can still be complete. Follow up only when the result reports access, protection, skipped-item, or partial-coverage warnings.
Osenpa Disk Analyzer
See what is taking up disk space before deciding what to remove.
Free
Windows 10 2004+ or Windows 11 · x64
Scan one drive or all drives
Run one coordinated, cancelable operation and review item-level access or protection cues before acting.
Use the available scan method
Read supported NTFS volumes through the MFT path and fall back to folder traversal when needed.
Narrow large result sets
Use the Large/old, Videos, Games, Archives or Safely cleanable views, or run a name search with a 2,000-result display limit.
Before you choose
- MFT scanning requires a supported NTFS volume and access; the compatible folder path can be slower.
- Access restrictions, disconnected volumes, and locked or protected locations can leave a scan incomplete.
- Name searches can count every match, but the results view is capped at 2,000 items.
Product tour
See the storage workflow
Select an image for a closer look.
Start with one drive or all connected drives and review the available storage. 
Follow scan progress and wait for the inventory to finish before reviewing results. 
Rank large files and folders, then inspect their location before taking action. 
Narrow results by name, size, date or category. 
Review allowlisted cleanup categories and protected locations before deleting anything. 
Read the cleanup receipt to see what was removed, skipped or protected.
Osenpa Disk Analyzer
See what is taking up disk space before deciding what to remove.
Free
Version 1.1.0
Download portable EXE
Verify the exact file and view mirrors
- Filename
- Osenpa-Disk-Analyzer-1.1.0.exe
- Size
- 163,495,485 bytes (155.92 MiB)
- SHA-256
dd7c7a47fb7bbd00e41d562d7045da76c19c41000db5cf43fae9d81ea4ef6e59- Authenticode
- Not signed
Archive.org saves this release as Osenpa Disk Analyzer 1.1.0.exe. The size and SHA-256 above apply to this filename too.
A matching checksum confirms the file matches this release record. It does not prove that software is safe or digitally signed.
More about Disk Analyzer
Features and working limits
Decision summary
Find what uses space before you delete anything
Use the scan method and completion state together. A size, age or category filter narrows the investigation but does not determine whether an item is safe to remove.
Use the available scan method
Read supported NTFS volumes through the NTFS master file table (MFT) path and fall back to folder traversal when needed.
Narrow large result sets
Use category filters or search by name. The results view shows up to 2,000 matches and reports the full count. Large/old marks items at least 1 GiB and 90 days old as review candidates, not deletion verdicts.
Choose a safer cleanup action
Open the item location first. Prefer the owning app's uninstaller or an action you can undo. For cache cleanup, use only the locations listed by the app.
Who this app fits
Good fit when
Choose it to scan local drives, filter the results, and inspect a large item or routine cache before taking action.
Choose another tool when
Choose another specialist when the task is duplicate detection, treemap visualization, registry cleaning or general PC optimization.
Important limits
- MFT scanning requires a supported NTFS volume and access; the compatible folder path can be slower.
- Access restrictions, disconnected volumes, and locked or protected locations can leave a scan incomplete.
- Name searches can count every match, but the results view is capped at 2,000 items.
- Large/old means at least 1 GiB and at least 90 days old; it is only a review filter.
- The portable EXE requests administrator privileges at launch. The Store build runs with standard packaged permissions, so the two channels can access different paths.
- Permanent deletion is irreversible; cleanup excludes personal libraries such as Downloads.
System requirements
- Windows 10 build 19041 or later, or Windows 11.
- x64 processor.
- Access to the scanned volume; administrator privileges only when the chosen operation requires them.
Choose a safe starting point
Scroll the table horizontally on a narrow screen.
| Goal | Start here | What to expect |
|---|---|---|
| One drive is nearly full | Scan that drive | The compatible MFT or folder path and a final completion state |
| The source is unclear | Scan All | One coordinated, cancelable operation |
| Find large, old, video, game or archive items | Use the matching filter | Large/old uses 1 GiB and 90 days; every result still needs review |
| Find a known name | Search by name | First 2,000 displayed with the real total reported |
| Reclaim routine cache space | Free Space Now | An explicit allowlist that excludes personal libraries |
| Move or remove personal content | Open location and inspect | Ownership, backup and dependency review first |
What happens from input to result
What is current in 1.1.0Version 1.1.0 makes multi-drive scans more dependable, improves filtering and removable-drive handling, and keeps cleanup behind explicit safety checks.
- Run more dependable multi-drive scans and use clearer filters and removable-drive handling.
- Use MFT scanning on supported NTFS volumes and compatible folder scanning when MFT access is unavailable.
- Keep the last complete result when newer work is canceled, fails, becomes stale, or finishes late.
- Review clearer item messages and use allowlist-based cache cleanup with fail-closed checks and a cleanup receipt. The byte total adds the reported lengths of successfully deleted files; it is not a before-and-after measurement of available disk space.
Product facts and portable file verified August 27, 2026.
Find the storage problem before removing anythingInspect candidates, use reversible actions and rescan.
Choose the storage scope
Scan the low-space drive or use Scan All when the source is unclear.
Narrow and inspect
Use the tree, category or name search with a 2,000-result display limit, then open the candidate location.
Act and confirm
Move the item to a reversible location, use the application uninstaller or send it to the Recycle Bin when appropriate, then rescan to confirm the change.
Disk scans run without internetScanning, filtering and cleanup stay local. Each launch checks update metadata and the public Supporters list; selecting Search online sends a separate Google query.
Stays on your PC
- File and folder inventory, indexes, filters and cleanup eligibility checks run on the PC.
- Disk scanning never uploads the file list.
- Access failures produce item-level messages for partial, skipped, protected, or inaccessible results.
Network actions and external links
- Each launch automatically sends one update-information request and refreshes the public Supporters list.
- Optional Google search is user-triggered and can include the selected full path.
- Do not use this command for a private path. Search manually with a shortened file name instead.
See the portfolio-level explanation in Network & data.
Local data and network use
- Scanning, filtering and cleanup work without an internet connection.
- File and folder inventory, indexes, filters and cleanup eligibility checks run on the PC.
- Disk scanning never uploads the file list.
- Protected or inaccessible items carry item-level reasons that disable deletion.
- One update-metadata request and one public Supporters-list refresh start automatically on each launch.
- Selecting Google Search sends the selected full path as the query.
- Sanitize a private filename or path before choosing an online search.
System requirements
Windows 10 version 2004 (build 19041) or later, or Windows 11; x64 architecture
Frequently asked questions
What is an MFT scan?
On a supported NTFS volume with native access, Disk Analyzer can read file-system metadata for a fast broad inventory. Other or inaccessible targets use the compatible folder scan.
Is every scan a complete inventory?
No. Locked, protected, disconnected or inaccessible locations can omit items. A switch from MFT to folder scanning does not make the result partial by itself. Follow up only when the result reports access, protection, skipped-item, or partial-coverage warnings.
How many search results are displayed?
A broad name search displays the first 2,000 matches while reporting the real total separately.
Does Disk Analyzer find duplicate files?
No. Version 1.1.0 is not a duplicate finder, treemap visualizer, registry cleaner or general PC optimizer.
Does Free Space Now delete personal files?
Its automatic cleanup uses an explicit allowlist and excludes personal libraries such as Downloads. Review the target summary before cleanup.
Can permanent deletion be undone?
No. Permanent deletion is irreversible. Prefer an application uninstaller, verified move or Recycle Bin when appropriate.
Can online search share a private path?
Yes. The optional user-triggered Google search can include the selected full path. Sanitize private names or inspect the item locally first.