I'd like to set path for uploaded files to Happy Files (https://happyfiles.io/) folder.
I contacted Thomas, the plugin author, for help and I got a reply:
"A HappyFiles folder for post type "attachment" (= all files) is a custom taxonomy term (named: happyfiles_categories) in your database.
So I'd say you have to check with the Metabox support if they provide any action/filter hook that let's you set the HappyFiles folder term ID once the file has been uploaded.
Would you like to help me with that :)?