I can see the songs when plugged into a computer but they do not play on the SweetPea3 (all models)
Make sure that the song format is supported by your model of SweetPea3. (see articles
on supported formats).
The songs may play when connected to the computer but that is because it is the
computer doing the decoding of the format, the SweetPea3 is simply acting like a
hard drive and streaming the data.