The preview pane in File Explorer shows you the preview for various file types in Windows 10 and Windows 11. Windows comes with a built-in set of preview handlers. In addition, third-party applications add their own handlers that can generate previews for their proprietary file types.

Windows allows you to turn on or off previews by enabling or disabling “Show preview handlers in preview pane” in Folder Options.
You may want to disable preview generation for a specific file type to improve performance. But, there is no built-in setting to disable preview generation (in the preview pane) for chosen file types. However, there is a handy tool that can accomplish the task.
This article tells you how to disable preview for certain file types in the Explorer preview pane.Read more