Hi @Peteris_Kuskis,
This requires both HTTP library and file storage to support file download and upload. The following posts could clarify why Request method of our platform and Serverless cannot support file downloads and uploads.
- How to create a ticket with attachments using request API?
- Error Received: Source.on is not a function
File upload is possible only if it can be converted as readable stream to upload to third-party without needing to store locally in the Serverless app. Currently, we do not have any samples for this (Please up vote the post #1 for requesting it).