What to do when ipod classic shows a red cross
I've come across the following information which may be helpful. If you are seeing the red "X" icon on the display, we will need to restore your iPod from Disk Mode.
iPod Displays a Red "X" Icon
Restore iPod from Disk Mode Disconnect iPod from your computer.Manually put iPod into Disk Mode.Open the latest version of iTunes and connect iPod.Restore iPod.
Restore iPod from Disk Mode
Retrieving data ...