@ptimson. Yes, you are correct. I used Postman to create a simple client to Post and I debugged into the upload code I mentioned. It never got called. I then found where the content type and associated files is created in the create method of [YourProject]/node_modules/@strapi/strapi/lib/services/entity-service/index.js. The fileInfo is totally ignored as far as I can see. Sorry I was not more help.