not sure if asked already, but fukk going through this thread.
i have a galaxy s3. For music, I mostly used a separate mp3 player that doesn't hold all my music, and the phone for everything else (to save battery). Currently I play music through Google Play Music and try to keep the most played songs on my device through the "keep on my device" feature. This way I don't waste data streaming my library when I could put it on my phone.
To that end, I decided to forgo my mp3 player (i was still rocking a zune

) and use my phone for all my music needs. So I bought an sd card to hold all my music on my phone.
The problem is Google Play Music, to my knowledge, doesn't allow one to download to an external sd card, only to the device.
So the question is this: What's the best method/software for syncing/playing music on android. I'm sure itunes doesn't work right? Right now I use zune software which is ehh at best.
Essentially I just want something where I can easily download music to my computer, edit tags and stuff in some software like itunes, and easily sync to my phone without a lot of dragging and dropping and manually copying files.