Folder Size vs TreeSize

Folder Size analyzes Windows storage to identify large files and folders and display disk usage in bar and pie charts. It scans local and external drives, USB and flash drives, SD cards, NAS, SAN, and network shares. A File Explorer right-click menu can start a scan of a folder and its subfolders. Results include lists such as largest, oldest, newest, empty, and longest-path items, with export to Excel, CSV, or XML. The application also lets users cut, copy, paste, delete, and move files or folders. Scan data can be saved and loaded later to compare results over time. The maker says scans run locally and data such as file names and folder sizes are not uploaded. A free plan is available. Personal costs 24.95 USD as a one-time fee for a license that never expires; Professional costs 39.95 USD as a one-time fee and adds command-line automation. The listed requirements include Windows 11, 10, 8.1, 8, 7, or Windows Server 2008 or newer, at least 1 GB RAM, and 10 MB of disk space. Folder Size cannot scan symbolic links.

TreeSize analyzes files and folders to show how storage is used on Windows desktop systems. Scans can cover local drives, network shares, cloud storage, USB drives, SD cards, and external hard drives; treemap views and file-type breakdowns help present the results. Depending on edition, results can be exported to PDF, Excel, CSV, HTML, or SQLite. Professional adds server scanning, command-line parameters, scheduled scans, and automated reporting. Other listed tools include deleting, moving, bulk renaming, archiving, duplicate finding, and deduplication. TreeSize Free is for private, non-commercial use on Windows desktop and cannot be used on Windows Servers. The editions run on Windows Desktop and operate on-premise; the maker says data does not leave the computer or site and is not shared with third parties. Personal and Professional have 14-day free trials, while SpaceObServer Enterprise has a 45-day trial. Annual prices listed include 20.40 € per user for Personal and from 40.80 € per user for Professional. The Free plan is listed at free.