ok I will break it down
with an Ipod you load the music from your computer... IF you plug an Ipod to another computer you can not transfer files / songs. that means if you go to a friends house and want a song off his computer, you will have to download it to a CD or data card, take it to your house and then transfer it to your Ipod
Some Mp3 players is not like this. Some mp3 players are just "USB drives" with earphones. That means if bubba Joe and a song you want on his computer, you can plug up your player.. transfer file and you have it (this also works visa versa, if he wants something off your mp3 player)
Take note. All are mp3 players, but some are transferable (which makes them more or less USB drives)
