What is the issue that you are observing? Are you unable to locate your new files? Do you observe any error message while trying to fill out forms? Please let us know the Android version and the device details.
I have my PDF file that I fill out for my customers and save it to my drive. Previously I could open them and edit what I've filled out. Now I can't do anything! It saves it as a permanent file that's unable to be edited, weird. Even weirder is that the old files before the update, I can edit like normal. It's the new ones after the update that I can't do anything with.
I have a Samsung Galaxy S5 active. Versión is adobe acrobat DC. It updated from reader.
Would it possible for you to share one such PDF file at firstname.lastname@example.org? What is the OS version running on your S5? Is it Android KitKat(4.4) or Android Lollipop(5.0)? You can find the same in 'Settings'--> 'About Phone' --> 'Android version'.