I want to transfer some file from my Windows 10 PC to my new Samsung Galaxy S6 Edge. I did this successfully a couple weeks ago, but now the phone will not connect as a device on my PC. My wife's phone (also a new S5 Edge) still connects. I'm looking for help with debugging this problem. When I connect a USB cable to the phone, I hear a quick beep from the phone and nothing from the PC; and the phone does not show up as a device on the PC. I have tried this on 2 PCs, with the same results. Help would be appreciated.