Filesystem
This article describes the filesystem of Mario Kart 8 (PAL release)
The Wii U uses an architecture similar to the Unix filesystem, in that there is a root directory / and all devices are mounted to subdirectories of this root. While an application is running /vol/content points to the main read-only data directory of that application. The contents of the Mario Kart 8 game disk or download data are mounted to this directory. The data contains all the courses, music, and many other files used by the game.
Both DLC Packs 1 & 2 are stored on the console's file system and are mounted to /vol/aoc0005000c1010ec00. However, the contents of this directory only store course, texture, & model data. It does not store music nor any data from the 200cc update.