It depends a little on how your current structure looks like.
Scenario 1: you already have all the files in separate folders but you want to rename those particular folders so that further data is added (even another layer of folders).
Then use "Format value" for _DIRECTORY with an absolute path like
Please note that this action does not include the filename part.
The current folder will be renamed and takes all files in it to the new location. No empty folders will remain.
Scenario 2: you still have to distribute all the files to separate folders plus rename the files.
In this case use Format value for _FILENAME
d:\mymusic\%albumartist%\%album%\$num(%track%,2) _ %title%
This will move all the selected files to the specified folder. The old folder stays where it is, even if it is empty now.