Folder-sync plugin.

Synchronize your track folders.

Steps:

Select a category.

Select a subcategory.

Select a genre.

Select the track Type.

When done Click Sync Now.

You can make a list of all your categories

Click on Sync Now. And wait......

Until finished  

All new tracks will be imported, also the track cover image!

Note: recommended to use when ready 

NOTE: when  The sync is fully done, not only by importing new files, but also by deleting files which are not in that folder anymore. So at the end you will have that subcategory reflecting that folder's content.