Can I use my iPod classic to store photos for my Canon 5D MkII? I have an 80GB iPod classic. I am going on a trip and I have only the iPod, my iPhone, and my iPad. I want to use the iPod to store photos. 

Is this possible?
Yes.

You need the discontinued "iPod" camera connector. (not to be confused with the iOS iPad camera connector)


http://support.apple.com/kb/TA38187


They are for sale on Amazon (and of course at local thrift shops and electronics shops worldwide).

http://www.amazon.com/Apple-Camera-Connector-iPod-White/dp/B000KIRGF4