When the ipod is totally clean and formatted i can use it as usb drive no problem. When I do restore in itunes, the Ipod gets stuck whenever I try to access it from my computer or Itunes. And it takes the Ipod something like 10min to load the firmware after restart (which is not normal...).
So I was trying to install rockbox instead, but it doesn't work without the original firmware and with it I can't access the Ipod.