Would you be able to clarify here what your endgoal is when you're attempting to upload this file into your File Manager? Are you working with a specific endpoint, if so, can you provide a link to the documentation you're referencing?
To clarify, currently we offer 2 means of uploading files, these are the following:
How to upload file into filemanager into a specific folder?
I am using this part of API — Upload a New File I have an existing folder in the File manager, and I want to upload a file into that specific folder. I know that I should use folder_ids parameter, but where I can find the id of my folder? In file manager I see only name of folder