OO DiskStat for Windows

Free Windows disk-usage analyzer

O&O DiskStat is a no-cost Windows utility that inspects your drives and folders to help you reclaim wasted space. It scans storage locations and presents a clear picture of how space is distributed so you can quickly spot large or unnecessary items and take action to free up capacity.

Notable capabilities

• Detects and removes duplicate files to free up space without manual searching.
• Handles batch operations so you can process many files or folders in one go.
• Offers import/export options for saving and restoring scan results or sharing reports.
• Uses a Windows Explorer–style layout for intuitive browsing and easy navigation.
• Produces in-depth breakdowns of folder and file sizes so you can pinpoint the biggest storage consumers.
• Scans across all connected drives and directories to provide a complete overview of disk usage.

Practical benefits

The program is suitable for both casual users and IT professionals. By combining visual, folder-level analysis with automated tools (duplicates removal, batch tasks, and report handling), it simplifies routine cleanup and helps maintain efficient hard drive usage over time.

Recommended alternative

If you want another option, consider History Sweeper — a trial edition is available for testing. It can serve as an alternative for users who prefer a different interface or additional cleaning features.