hello, I purchased a used nexus 7 2013 vzw LTE tablet 6.0.1. I am having trouble getting anything to happen with the usb other than charging. I tried factory reset and debugging. I have a phantom 3 advanced with v1.8.80. phantom works with my phone (htc). when I plug the nexus in all it does is start charging. I tried plugging it in to two different windows computers and it does the same thing just charging. I also tried several usb cables. thanks in advanced for the help.