iPod Exclamation Mark and Folder IconiPod Exclamation Mark and Folder Icon
The iPod exclamation mark and folder icon is usually a sign of a communication error inside the iPod. This is common symptom when the hard drive inside your iPod looses is configuration settings.
What should I do?
The most appropriate course of action is to immediately try and recover the files from your iPod.
Follow the Guide to using Recover My iPod.