I am having issues transferring music from my Windows 8 PC to my Droid Maxx via USB connection. I have the box checked for MTP, and all drivers and upgrades for Motorola Device Manager were successfully installed on my computer. When I connect via USB, I keep getting a notification that I have an option to install Device Manager again. If I click on that option, nothing happens. When my Droid was recognized, I clicked the option "Open folder to view files." I am able to browse my device and locate an empty Music folder, but I am unable to drag and drop any music files into it (from iTunes) as I was able to do with my older Android devices. What am I doing wrong? Can someone help me?