Get rid of duplicate songs on phone when using Google Music I've uploaded my mp3s to Google Music. I also physically have the files on my phone. But now when I use the Google Music app it shows the songs on my sd card and the songs I've uploaded to the cloud.

Apart from deleting the files on my phone, is there a way to tell Google not to sync songs I already have?
I think that there is no other way as to simply delete the files on your Android device. Make sure you have a copy of the files on your PC or an external HD. I am not sure if one can download the mp3s easily from the Google music cloud. You have the files in Google musics cloud, why do you need them on the device too? The music App will cache the files on the device for fast/offline access.