| .001 .002 .003 .... | Splitted files | Join the with HJSplit |
| .7z | File created by 7zip. Greater compression than zip | Open with 7zip or WinRar |
| .app | Decrypted System menu File | Not usable (unless you need it for themes) |
| .bat | Windows Batch file. Will automatically perform certain commands. | Open with windows. |
| .bin | Usually your NAND backup or a save file. | Save files are used by the System Menu and the NAND is used by Bootmii |
| .cfg | Configuration file created by a application to maintain settings. | Automatically created by applications. |
| .cISO | A stripped and compressed .ISO file which only contains a game/update partition without garbage data | copy to WBFS |
| .cmd | Command line file. Will automatically perform certain commands. | Open using cmd (Start -> Run -> CMD) |
| .csm | A Custom System Menu File which is basically a theme for the Wii. | Install with MyMenuify. |
| .dol | A Wii executable file, can come in forms of 'main.dol' and 'boot.dol', just like an .exe for Windows | Load with HBC |
| .elf | An alternavtive Wii executable file, can come in a form of 'boot.elf' | Load with HBC |
| .exe | Windows Executable File | Start with Windows. |
| .gcm | Gamecube Game File | Burn on a disc, combine with Multigame ISO Creator, or copy to a hard drive, and play with a backup loader. Also playable with Dolphin emulator. |
| .ini | Short for initialization. Used for Priiloader hacks and configurations for Apps in general. | Hacks.ini -> Place on the SD root and use with Preloader. |
| .ISO | Disc Image (not picture!) that can most of the time only be booted from a disc (after burning) | Burn on a disc or copy to a Hard drive and play with a backup loader. Also playable with Dolphin emulator. |
| .mp3 | Music file | Play with WiiMC or another music player |
| .mym | A file that has pictures in it (rename to zip to see those). | Use mymenu to combine it with the .app of your region (it will generate a .csm) |
| .png | Picture file usually used for HBC or USB Loaders. | Programs will detect it if placed in the correct spot. |
| .r00 .r01 .r02 .... | Splitted Rar files | Put them in the same folder and open the first one with WinRar |
| .rar | File created by WinRar. | Open with 7zip or WinRar |
| .txt | Usually a readme that contains instructions on how to use the program it came with. | Open with Notepad. |
| .wad | A channel, IOS, or system menu packed into 1 file and can be installed onto a Wii. | Install with Wad Manager or let other programs do stuff with it. |
| .wbf1 .wbf2 | Splitted .wbfs file (due the 4GB limit of FAT32) | Play with Configurable USB Loader or USB Loader GX |
| .wbfs | A special version of a Wii game that can be loaded from FAT partitions | Play the game with Configurable USB Loader or USB Loader GX |
| .wdf | Wii disc file. This format is only used by Wiimms WBFS tool | Open with WWT or WiiJManager |
| .xml | Organized files which holds information for apps in HBC and PC programs like NUSD | Programs will detect it if placed in the correct spot. |
| .zip | Compressed file to save space | Open with WinZip, 7zip or WinRar |
