How to Unhide Music Files on an iPod
- 1). Click the "Start" button, the "Control Panel" link, the "Appearance and Personalization" link and then the "Folder Options" link. The "Folder Options" dialog box displays on-screen.
- 2). Click the "View" tab and the "Show Hidden Files, Folders and Drives" checkbox to display the hidden files on your iPod.
- 3). Click the "OK" button to apply the changes and close the dialog box.
Source...