We are using google drive in college to store our academic files and I don't have any problem with using it via PC but I have a frustrating issue with the mobile app. Everytime I was given a Google Drive link for me to store files on a specific folder, I cannot add anything to it, there were no + sign when I'm using a phone. Please fix this ASAP, not everyone in the Philippines has a PC so it's a bit of a struggle for mobile users to add and transfer files.