You have a 4th gen Ipod. First reset the ipod , then put it in disk mode. then plug it back into computer. That second icon of the folder means it can't find an OS. You might have to take it apart to see if you have the hard drive seated correctly and the hard drive ribbon. If none of this works, uplug and restart it, hold you ear to it and listen to see if you hear a clicking or buzzing sound. If you do the hard drive is bad. To do a reset -toggle the hold switch on the end by the screen then press and hold the center button and the menue button at the same time-then as soon as the apple comes up - press and hold the center button and the botton of the click wheel, disk mode should come up. Plug back in and see if it comes up in itunes do a restore. The bottom of the click wheel is play- pause. It's also what you hold to shut it down.