Upload files in your media library to a custom folder structure on your file system created with Real Media Library folders.
Media library folder field for Advanced Custom Fields (ACF). Folder created by Real Media Library.
Create a gallery of documents from a folder in your media library created with Real Media Library.
Synchronize your folders and collections in Real Media Library (Media Library Folders for WordPress) with Lightroom (with the help of WP/LR Sync).