Fast, powerful, pro disk space analysis software for Windows. Desktop PCs, laptops and servers can quickly end up accumulating large quantities of unused, temporary, and duplicate files. Before you know it, you’re out of disk space, backups are taking far too long to run, users can’t find what they need, and you’re struggling to plan for the future.
You need a visual, interactive software tool to help you manage disk space. You need FolderSizes – the award-winning, network-enabled disk space analyzer for Windows. It can quickly isolate large, old, temporary, and duplicate files, or even show file distribution by type, size, attributes, age, depth, or owner. All with multiple export formats, command-line support, report scheduling, and much more.
Scheduling and email integration
Robust, built-in report scheduling with email delivery support
Folder and disk trends
Trend analysis features show disk usage and folder sizes over time
File system snapshots
Unique and powerful file system snapshot capability
Disk space bar, pie, and treemap
Stunning disk space visualizations – bar, pie, and treemap views
Fast disk space reporting
Performance & scalability – analyze any file system with confidence
Analyze network disk space
Network share discovery for servers, storage devices, and domains
FolderSizes goes far beyond the capabilities of existing disk space analysis tools with superior features and performance. Try it and see why so many customers depend on FolderSizes.
File system search
Search for files and folders by age, name, attributes, size, owner, & more
Largest, oldest, newest, duplicate, and temp files
Quickly isolate largest files, oldest files, duplicate files, and temp files
Report files by type, age, owner, depth, attributes
Reports for file types, attributes, owners, sizes, names, ages, & depths
Export file system analysis data
Export reports to MS Excel, PDF, HTML, CSV, and TXT file formats
Re-load and compare file system analysis reports
Save, re-load, and compare folder size report data
Version 10.3.88 (Released September 10, 2026)
- Improvement: Improved main window “This PC” storage view.
- Improvement: Improved File Reporter navigation pane with count and status badges.
- Improvement: Improved tooltip layouts to help avoid vertical clipping.
- Improvement: Added new “Border beam” folder scan progress animation.
- Improvement: Path location bar now handles Ctrl+Back and Ctrl+Del.
- Improvement: Disk Space History dialog layout improvements (shared header with tabs).
- Improvement: Disk Space History dialog includes complete report HTML export option.
- Improvement: Improved performance of shell enumeration operations.
- Improvement: Improved path input normalization and history tracking.
- Improvement: Improved theme conformance and layout of global options window.
- Improvement: Main window ribbon keyboard support is greatly improved.
- Improvement: Improved keyboard navigation across multiple product views.
- Improvement: Path location bar now summarizes multiple scan paths rather than listing them in full.
- Improvement: Location bar tooltip lists every path within a multiple path scan.
- Improvement: Redundant scan paths are now consolidated on entry.
- Improvement: Scan data tree now emphasizes every scanned path rather than only one.
- Improvement: Refreshing the scan data root now repeats the original scan, re-importing any snapshots.
- Improvement: File Reporter no longer returns focus to the path bar upon report completion.
- Improvement: Improved text clarity in treemap and sunburst views, most noticeably on standard resolution displays.
- Improvement: Treemap tile labels now step up to larger font sizes where space allows, with icons scaled to match.
- Improvement: Redesigned product trial dialog with task-oriented flow.
- Bug fix: Fixed a couple missing icon light/dark theme color mappings.
- Bug fix: Fixed minor rendering artifacts on standard resolution displays.
- Bug fix: Fixed bugs affecting file report settings persistence.
- Bug fix: Fixed context menu incorrectly showing for Disk Reporter group rows.
- Bug fix: Fixed new scans and folder browsing being ignored after a snapshot file import.
- Bug fix: Fixed File Reporter discarding snapshot paths when combined with folder paths.
- Bug fix: Fixed a crash when refreshing the scan data root node from its context menu.
- Bug fix: Fixed scan data root selection showing a parent folder rather than the paths scanned.
- Bug fix: Fixed refresh of the scan data root covering more than the original scan.
- Bug fix: Fixed location bar not updating after removing a node from the scan data tree.
- Bug fix: Fixed location bar animation stopping incorrectly in specific scenarios.
- Bug fix: Fixed rare folder scan cancellation delays in specific scenarios.
- Bug fix: Fixed scan data tree root selection incorrectly updating location bar.
- Bug fix: Fixed location bar occasionally displaying no folder icon.
- Bug fix: Various minor corrections to product licensing flow.
Thanks to Team ZWT / UZ1 / CORE release
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