iTunes: Understanding the iPod Photo Cache folder

When you use iTunes to sync photos to your iPhone, iPad, or iPod, iTunes creates a folder called iPod Photo Cache. The iPod Photo Cache stores photos that are optimized for display on your device. The location of this folder depends on the syncing options you select. In iTunes, if you change the selection in the Sync Photos From menu, a new iPod Photo Cache folder will be created (and the previous folder will remain).