I am going to ask the same question again, as there is not enough specific information in that reply for me. I have dragged music files into my N7, to locations that Explorer showed me and they looked like music folders, but when I start the N7 included Music App, I can't find those songs anywhere. And yet, there is some other "junk" available to play that came off my computer, but I never put it there. What gives with that? When you say "Drag it to your Nexus 7 using Explorer, exactly what is the music folder name in N7 where the (MP3 files, for example) files should be dropped?
Thanks, a N7 newbie, and not much of a computer nerd, but I can drag and drop if I just know what folder. My guess didn't work!