On the Droid incredible stock e-mail program under attachment cache there are three options 1. Internal storage. 2 . Phone storage. 3 . SD card . What is the difference between phone storage and internal storage ?
I'm pretty sure phone storage is the space where apps are installed (referred to "phone memory" under settings). Internal storage is the larger storage space that came with the phone for storing basically anything else, such as mp3s and photos.