https://www.bleepingcomputer.com/news/microsoft/windows-11-gets-a-new-tabbed-interface-for-file-explorer/

Microsoft is testing a hidden feature that enables a new tabbed interface for Windows 11's File Explorer, which has been highly requested for years.

File Explorer is one of the most commonly used built-in Windows features, allowing you to view a device's file system, access folders, and manage files.