Thank you so much.. I'm still not sure (from my screenshot) how I can duplicate the "Title" to march the "Filename" as it's easier just to duplicate the Title to the Filename. Otherwise I have to retype all Filenames.
Which one am I suppose to use? I can use the one converting Filename to Title but I need to know if there's another that can convert Title to Filename. If there is, please let me know as I am new to this.
The function Convert>Tag-Filename is sort of the reverse function.
You can define what the filename should look like. For this use variables for tag fields (like %title% or %artist% and string constants like "-" or "_"
So, you could put together a filename with data like this:
%artist% _ %title%