What is New in TreeSize?

Are you missing something in TreeSize or do you have an idea for a new feature? Then become part of the decision-making team and vote for features!

Version 9.1.2

  • An error when starting the TreeSize File Search in Chinese (Traditional) language has been fixed.
  • An error in the formatting of hyperlinks that led to an error message during Excel export has been fixed.
  • The integration in the context menu of Windows 11 has been improved. TreeSize now ensures at starup that the context menu entries are available as configured.
  • An error when renaming files with very long paths via mass renaming has been corrected.
  • An error in the calculation of paths in Outlook scans has been fixed.
  • The Details list now retains the sort order again during a scan.
  • Creating snapshots (shadow copies) on ReFS disks now works as expected.
  • File search: The function for sorting by check state works as expected again.
  • A possible error when updating a SharePoint scan has been fixed.
  • When opening the file search from the context menu of a ZIP file, the application could freeze. This error has been fixed.
  • An unhandled error has been fixed that could occur during calculation of MD5 hashes for partially unreadable ZIP files.
  • Other minor corrections and improvements have been made.

23 February 2024

Version 9.1

This update contains 3 Community Features from our Feature Voting Platform: "Total items" & "Number of subelements" as new columns, Duplicate Search in Windows context menu and faster exports.

New Features

  • In the details list and search results, it is now easier to select the relevant columns from all available options. The display is grouped by type.
  • When selecting a scan destination, you can now more accurately select your desired destination and configure access credentials.
  • File Search: Simple Search now allows you to use parentheses in your search term to refine your search. For example, entering (readme, license) *.txt will find all text files with "readme" or "license" in the name.
  • File Search: In Simple Search, spaces now act as AND links between search terms, not as part of the term. The search term "New Folder" now finds folders named "New Folder" as well as "Folder New" or "New Test Folder". Use quotation marks for exact matches. A comma now works as an OR operator; it is sufficient if one of the terms occurs in the name.
  • You can now start mass renaming directly from the Explorer context menu for selected files in Windows 11.
  • Via the jumplist entries in the Windows taskbar (the jumplist appears after right-clicking an application icon), various areas of TreeSize can now be opened directly, e.g. the most recently performed searches or scans.
  • File Search: File operations can now be performed directly on files inside zip files.
  • The details list now supports two additional columns, which can be activated via "More Columns" in the right-click menu of the header: 1. "Total Items": shows the sum of subfolders and files in total and recursively, 2. "Number of Subelements": shows the number of files and subfolders a folder contains directly. (Your request in feature voting)


  • TreeSize can now also use the user currently logged in to Windows to log in to SharePoint (integrated Windows authentication).
  • File search: The user interface for creating and editing search filters has been further improved. For combined filters, it is now even clearer which filters belong together and how they are linked. Individual filters can now also be adjusted or deleted directly via an overlay menu. 
  • File search: The "Empty folders" filter template has been improved.
  • The TreeSize Duplicate Search is now available in the Windows File Explorer context menu. (Your request in feature voting)
  • Information required for an export is now increasingly determined asynchronously to speed up the export. (Your request in feature voting)
  • General memory usage reduced: TreeSize now discards unnecessary scan information early during automated exports, significantly lowering memory consumption for exports. Using /PrefetchFiles False, asynchronous preloading can be disabled, further reducing memory requirements but increasing export duration.
  • TreeSize now also supports large folders in SharePoint libraries that contain more than 5,000 items.
  • Azure Blob Storages can now be accessed directly via the URL displayed in the web browser.
  • File search: The error messages for failed deduplications have been improved.
  • File search: Search paths that are not checked are now retained when switching between searches and are no longer removed for the current session.
  • File operations: When using the log or undo script function, the information is now automatically written to an alternative file if access to the specified file is not possible.


  • It is now possible to read more than 5,000 files in a directory on an Azure Blob Storage.
  • When displaying large folders in the details list, the application could eventually freeze for some seconds. TreeSize now remains responsive again in these situations.
  • The "Last saved by" column now returns correct values for files on SharePoint.
  • A possible error when comparing a scan with a scan previously saved to a file has been fixed.
  • Empty directories are now also copied in the "Copy/Move" operation. 
  • If elements cause problems during the copy/move operation in the file search, this is now logged correctly. A misbehavior could occur in previous versions when copying files from a mobile phone.
  • The option to calculate date values for folders based solely on the files they contain now works again as expected.
  • The context menu options are no longer written to the local registry when running the portable version of TreeSize Professional.
  • The scan history may have been saved in the profile of the current user (AppData) when using the portable version of TreeSize Professional. In this situation, the history is now always stored together with the other options in the folder of the portable installation.
  • When deleting a symbolic link to a folder, the symbolic link is now deleted and no longer the linked folder and its contents.
  • File search: The command line parameter /SCAN is now also evaluated correctly in combination with /FILTER regardless of the order of the parameters. 
  • When comparing a scan with a previously saved scan, folders that had been deleted in the meantime were no longer displayed as such. This error has been fixed.

18 January 2024