A Microsoft file hosting and synchronization service.
Hi everyone! I have found a solution to this problem. I accidentally hid ALL of my shared folders and started panicking, but to unhide/view them, all you have to do is go to OneDrive online (the web version), click on "More" at the top next to the PDF filter button, and click "Hidden" at the bottom of the dropdown menu. It should display all of the files that you just hid. Hope this helps!