check the box that says “Disable verify obb on first start/update”
check the box that says “Allow large OBB Files”
check the box that says “use externalfilesdir for UE4Game Files”
when you package your project, dont run the batch script to install it, ive literally never been able to get that to work. Instead drag the apk file directly on your phone, then unplug your phone, double tap the file and it should install fine.