Android Tablet won't sync to SD card



I have an Android tablet with KitKat 4.4.4 and I can't upgrade to any later versions. Can anyone direct me on how to sync to my SD card? I do have root access, but no move app to SD card with, or with out root has helped, and I'm officially stumped. If it matters, it's an Acer B1-810 tablet with a 128GB SD card.


Plex are stumped too on SD card issues.


Every single device my family ever owned, if it uses an SD card, Plex wont reliably use it. They've completely ignored me too. Good luck.