Google Music Help

Hey guys. So I own a Nexus S (yeah, we exist) with stock 4.1.2 and after unplugging it from my computer, the Google Music app doesn't detect my music. It's had the screen saying 'Ways To Add Music for three days now'.

I'm positive there's music on my device because

a. There's a music folder on my device

b. The PowerAmp music app recognizes songs on in the folders.

I've tried to induce the phone to recognize it. I've cleared app data and cache, restarted the device, synced music with Windows Media Player, deleted and restored the Music folder.

I've contacted Google Play but the specialist gave me repetitive advice basically. P.S. This is offline music (I'm in Canada)