Flash filesystem

Persistent state on the Wii is kept in an encrypted filesystem on the 512MB NAND Flash chip. Most of this is accessible from code running on the Broadway using IOS_Read() calls.

• /: This is the root directory, containing all other directories.
• /dev: There are a number of "resources" stored inside the /dev tree, but these are not actually present in Flash; they're "virtual".
• /import: This is used as a scratchpad / staging area during import of new contents / titles
• /meta: Generic opening.bnr files for the Photo, Shop, Mii, Forecast, and News channels. They don't resemble the actual opening.bnr files for those channels.
• /shared1: "Shared" contents that are installed by various channels are installed here.
• /shared2: Miscellaneous info that is not specific to one title.
• /shared2/ec: State kept by the Wii Store (EC = "Electronic Commerce", probably)
• /shared2/menu: Public state, managed by the menu
• /shared2/sys/NANDBOOTINFO: This file keeps state about what title was most recently launched by the System Menu.
• /shared2/sys/SYSCONF: Most settings that are managed in the Wii Menu (calendar, screen size, etc)
• /shared2/sys/net: Network connection profiles
• /shared2/test2: Diagnostic files kept by the System Menu; no known purpose.
• /shared2/wc24: Data files used by WiiConnect24. Most communication with WC24 is done by reading and writing these files
• /sys: Files used by IOS internally to track state
• /ticket: Tickets for installed titles
• /title: Contents of installed titles
• /tmp: Used as a temporary area by IOS and various other programs; often, files are created here and then immediately moved elsewhere. This directory is automatically cleaned up whenever IOS boots.