Bulk Assigning Media Categories

Hi,

Thanks for contacting us here about this extension.

After creating the media file structure to my needs, and naming the folders accordingly, is there a way to bulk select media files and assign them to WordPress categories?

Do you mean categories created in Media library? If yes, you can use "Bulk Select" button on the toolbar.
Please go here for more details:

https://www.joomunited.com/wordpress-documentation/wp-media-folder/198-wp-media-folder-folders-and-media#toc-2-manage-media

Hope it helps!
Kind regards,