I have a Nexus 7 16G and right now I have attached a flash drive to the unit. From reading everything, it says I can use Es FileExplorer and get to /sdcard/usbStorage/sda1 - however, I cannot get to this folder. When I click on the /sdcard/ - I get clear history. I tried using my Bluetooth keyboard to type, but that did not work. Everything I have read speaking about rooting the device, which I do not want to do. How can I get to this folder? The Media Importer screen does not work either. Thank you!