Put the mp3 player into the usb port of the computer.
Goto to "Start" then "My Computer" then find the name of your mp3 player.I.E "SIREN MP3" OR SOMETHING LIKE THAT.
Right click on the mp3 player icon and select "Format".
You will get a message saying "Formating this disk will erase all data,Continue?" Then press yes.Thats it. hope this helps
jonathon
January 2006