Please help, Can't Write Sdcard and USB OTG afte MM update

Hi guys, i have been facing write permission restrictions with my Sdcard and usb otg after update to MM6.0.1. I can only read the files but i can't write. A friend told me its issue is from sony so i tried existenZ MM but had the same issue, i am currently on existenZ MM now. Any help/fix or pointers? thanks in advance

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