If you are using a WBFS drive and do not want to convert, does this happen when you try to add other games? More specifically, does this happen for other Gamecube games? From my very brief search, it seems like you need to have a FAT32 drive in order to use games with Nintendont (might not be the case with other GC launchers, but it seems like Nintendont is the most popular option, and it is the only one I have experience with). Additionally, at least for FAT32/NTFS drives, if you are using Nintendont to launch GC games you don't need to convert nkit.iso to regular iso, Nintendont can read nkit.iso games (though wii games will still need to be converted to iso or wbfs to be played by usb launchers). If your drive is already FAT32 (or NTFS), then you do not need WBM to add games, you just need to drag and drop games to the proper directory*. WBFS drives are no longer the recommended way of storing games as it requires special software to add/access files (and with the wii being so old, who knows how long these programs will stay updated/available), so if possible it is recommended to convert to FAT32. If your drive is not FAT32 (or NTFS), it may be formatted as WBFS. First things first: is there enough free space on the drive, and have you restarted the program? If the answer to both of these is yes, read on.ĭo you have other games on this drive? If you have no other games on this drive, you should format it as FAT32 (if not already done).