Music on sd after factory reset

[robcassman]

Note 4. I had downloaded my Google Play music (purchased) to my external sd. I pulled it out and then did a factory reset. After putting the sd back in the music library isn't there. Is Google not smart enough to see the music is on the sd card? If I have to download the songs all over again, does that mean the songs are on the sd card twice? If so, how do I erase the old music files?

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