With Mendix 11.2 a new saveFile API is available. This API accepts a blob object and saves it as the contents of a FileDocument specialization.
Great if it would also accept a URL, especially on native, data is already sitting in a file, now I need to fetch the URL as blob and pass that to the API. This means the entire file needs to be loaded in memory as a blob. Better if the save file API could take a URL and use RN blob util to copy the data, less memory consumption for large files, like PDFs