I have a free Spotify account and can very easily sync music files that are on my computer to my Android device via wifi. But I can't find a way to sync files that are on my Android device back to the computer.
I've looked for a way to do this using Google Music and can't find it. Same with Amazon MP3.
If I download an MP3 on my phone, I'd like to add it to my computer's library and be able to easily sync it and then play it with Spotify, Google Music, Amazon MP3, etc., regardless of where I'm playing it.
Is there some reason the various cloud services allow you to sync from computer to device but not from device to computer?
Any suggestions on easy ways to accomplish this with some other software? Or am I missing something?