There is another post on USB issues. It seems a couple of users have had success with USB 2.0 cables, but I have done some research and there are 2 kinds of micro USB cables. A standard and a OTG (On the Go). The OTG cable is wired differently, so we are still trying to figure out if the issue is USB 2.0 vs USB 3.0, or standard vs CTG. My standard micro USB 3.0 adapter does not work. I have ordered a micro USB 3.0 OTG cable from Ebay and will see. Also, one poster is working with Nokia and the are supposed to get back to him.