Some games, such as that one, ask where to locate their data files. The program still lives in the internal storage though. Programs on the tablets can't run from flash memory cards that are formatted to work with Windows, as most are. Programs can use data files on those flash cards though. Easy Debian installs a huge data file on a flash memory card, and that data file holds all the programs it runs. It's essentially a virtual hard drive in a file, a special, roundabout trick that lets the tablets do some things they otherwise couldn't. The programs that make up Easy Debian itself and pull off the trick though, they live in the internal storage.