How to Add Extension of album files in folder names?

[Palladio]

@ohrenkino

To rename a folder, use Converter>Tag-Tag for _DIRECTORY and enter a full path like
d:\my music\%ALBUMARTIST%\%YEAR% - %ALBUM% (%_extension%)
do not add the filename part.

Is there a way to add the value of (%_extension%) in Uppercase style to the folder name?