Make sure that "Enable disk use" is checked (highlighted here in green). This will let your computer treat your iPod just like any hard drive, CD, DVD, or other removable storage device.
Using iPod Disk Mode for File Storage and Backup
By Sam Costello, About.com Guide
Explore iPhone / iPod
Must Reads
About.com Special Features
Smartphones: A Trip Down Memory Lane
Industry products and developments that made the smartphone what it is today. More >
Family Tech Center
Stay connected and entertained with reviews on tips on the latest HDTVs, cellphones and more. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.