I have a droid x and verizon service. At a national battlefield I recently visited, I was told I could get commentary on the various events in the battle by downloading mp3 files for each location into my smartphone. I followed the link to the website, clicked download on some of the files but was never able to see any of them in the files on my sd card or by using any of the apps I have downloaded, including "adobe reader," "music," "listen" or "music" apps I have installed. Must I download such files using a computer?