How do I play audio files on my Pathfinder Plus?
1. Once you have your audio files, (MP3, WAV, or WMA), you can play them on your Pathfinder Plus.2. Insert your USB Flash Drive or an SD Card into your computer so you can copy and paste your files onto the drive/card.
3. Remove the drive/card and insert it into your Pathfinder Plus.
The most effective way to do this is to use an SD Card onto which your store all your MP3 files. Insert the card into the SD slot on the top of your device and leave it there. This gives you permanent access to all our songs. You could also plug in a USB drive to use permanently, but it could easily be damaged since it sticks out from the side of the case when it is plugged in.
4. Once your drive/card is inserted into your Pathfinder Plus, select the SYSTEM key twice (on the front of your Pathfinder case). Select the MP3 Player key from the System menu screen.
5. Select the PLAY button to play your songs. 
The MP3 Player will begin playing the first song listed on your USB flash drive or SD card, and will continue to play until every song on the drive/card has been played.
As the songs are played you will see ,in the upper left corner of the player, the total time of the song in minutes and the name of song as it appears on the drive/card.
NOTE: If you notice that some of the songs don't play, it could be that they are not in the proper format (MP3, WAV, or WMA). One other possibility is that the songs are copy protected, in which case they will not play.