File upload on Mobile please!

I'd like to request being able to upload files other than images, like pdf, txt, and so forth in channels that allow it on mobile discord. I'm not sure if it is OS specific but the users on my server need to upload character sheet updates via file, not link, and this seems to be impossible on mobile discord platforms at the moment. Please add it. Or let me know how to do this so I can inform my users.

Thanks!