When I connect my Honor 5x via USB and look in Windows explorer, I only find a 'Documents' folder on the phone. No sub folders, no music folder, and I don't see the SD card at all. The manual gives no instructions other than to say transfer music via USB. Tried to dump files into the Docs folder, but it has almost no room, and I've put nothing in it. The SD card has several gb free, but I can't access it. Also looked at the music app on the phone and see no way to import from there. Is something missing, or am I going about this wrong? Thanks