Sorry Papa, but there don't appear to be any settings that will allow you to specify where to cache music in the Google Music app. In fact, it doesn't even appear that you can specify where to PIN any of the albums that you want to stay on your phone. On top of all that, you can only PIN albums, not individual songs. Finally, when albums are pinned to the device, they aren't even recognizable in any file manager.
Can you tell I'm rather disappointed in their implementation?
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