Hi! I recently got a Samsung Tab A which runs Lollipop 5.0.2 and I'm having troubles saving annotations and sketches in my PDFs saved on my SD card (Samsung Evo Plus): every time I tap on the edit button a window pops up with the message "This document is read-only, so changes cannot be saved. Would you like to create a local copy on your device to continue editing?". The tablet does save changes, but on the device storage, not in the original location on the SD card. I checked and my PDFs are not read-only files, but I keep having this problem only on my SD card (not on files saved on the device). Is there anything I can do to save the changes on the original file? Thank you
Android Kitkat version and 5.0 version has put a limitation of writing on SD card from any third party App. Please update your software and confirm if you are still observing the issue.
Adobe Acrobat Team
I have the Samsung Tab S 10.5 with Android 6.0.1 and I have exactly the same problem. Could you solve the problem?