SOURCE: MP3 player [RCA # TH1032]
If all else fails, reformat it. Ensure that you format on "FAT" instead of "FAT32". Once you're done, you can always easily drag and drop the new music you want on it into the device. As for the CD, if it's a bought CD then it's more than likely Media Rights Protected. You won't be able to transfer any music from it to the device.
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