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Whenever I move my MP3 files to my USB and play it in the car, the files get cloned. For example:
Sia - Chandelier
Then the clone looks like
.Sia - Chandelier
The clones don't actually work. They're simply the MP3 file names. Whenever I select them in my car, it skips to another song that doesn't have . before it. So on my Mac OSX, the MP3 look normal, and have no clones, but once I plug in the USB to my car, every song has its own clone.