If you guys haven't noticed you can't copy a file from internal sd to external sd (confirmed by me and others) Well I figured it out.
I remember something about OTG not being able to read from external on apps like Tibu with other devices. I did something similar to get it to work on the ZU GPE.
If you are rooted you can copy this file to /etc/permissions/
I tested copying a file from internal to external and it worked fine after this change.
I did make a couple changes to the file, I'm not sure which did it but one of them did. I am attaching the file
Just rename from platform.xml.zip to platform.xml, back up existing file(the attached file is NOT a zip.. it's a XML file just remove .zip from the end of the filename), copy new file and change permissions to match the old file