What is the differance between the two? And how do you "format internal memory"?
-Formatted internal memory
-Swapped out Class 4 SD card with a Class 6 card ($15 from amazon)
-Formatted SD card
Internal memory (called sdcard if you browse to it from file browser on phone) is just an sd card soldered to the board and is where most apps are installed. SD card mentioned here is the physical card that is removable (called sdcard-ext when browsing phone with file browser).
Menu/settings/storage/format internal storage. Formatting the internal storage will mean you will have to reinstall all apps and set them all up again to your liking unless they have a backup option where you can backup the settings to the external sd card.
Sent from my DROID X2