LG G3 can't load music from PC
I'm trying to load music from PC to phone using USB cable. Cable is good, have tried using both ports on PC (ports always work). AT&T's tutorial says "To place the device into the correct USB mode, swipe down from the top of the screen and tap Charge phone, then tap Media sync (MTP)."
Nothing like that happens; there's no icon saying "Charge phone," and I cannot find "Media sync (MTP)" anywhere. There's no notification about "USB connection type" displayed. At this point I can't continue with the steps to load music. I have tried searching through all the settings for "Media sync" and can't find it; same for USB connection type. And, interestingly, the phone doesn't show up in an Explorer window on the PC when USB connected.
Maybe I need to do a "Backup & reset"? Can someone please help me through this. Oh, and I Also cannot add a "Ringtone" for the same reasons - the steps do not work.