Why can I only upload files from Drive?

[AC Question]

I'm a student and I use my android tablet for my classwork and notes. Almost all professors require papers to be submitted as a word doc, therefore I write all of my papers in the word app. The issue is, that on sites such as blackboard when I attempt to browse my "computer" I can only access files from google drive, and not from my actual device. I've worked around it by uploading all of papers to drive first and then uploading them to blackboard or whatever the site may be, but I feel as if there should be a workaround? This doesn't only occur with blackboard, but with other sites/apps where I would like to upload docs and photos.
I'm running android 5.0.2 on a samsung galaxy tab s.

Thanks so much!

 

[B. Diddy]

Welcome to Android Central! It may be that the Blackboard website can't access the device's internal storage. Can you use a Blackboard app?