Upload multiple PDF files - SAP BO

Hi guys,

I try to upload multiple PDF files to SAP BO platform.
The BO Restful documentation says: “You can also upload multiple BOE and non -BOE documents at the same time”, “The workflow is executed in the Postman REST client”

It works fine with selecting one pdf but cant make it work with Multiple pdf.

475912 is the folder id:

POST https://xyz/biprws/v1/folders/475912/file


Only 1 file created as the response shows.

Also tried to duplicate the KEY:


But only the first pdf uploaded.

What am I missing here?

Thanks, Tibor