What is Reddit's opinion of MP3 Player, Soulcker 16GB MP3 Player with Bluetooth 4.0, Portable HiFi Lossless Sound MP3 Music Player with FM Radio Voice Recorder E-Book 2.4'' Screen?
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By popularity on Reddit, this product is:

This one?

Also, how do you download music to a nugget for free? Everything seems to be paid only.

This, just buy an additional 128 gig memory card: