https://github.com/Yardape8000/haxchi/releases/tag/v1.4noSD ** Be careful to follow the instructions exactly. I take no responsibility for bricked Wii U's.** More useful for SysNAND, because for RedNAND you still need the RedNAND SD card installed. This mod will allow you to install the custom firmware on NAND so SD will not be required. This does not replace the Wii U's firmware. This just puts fw.img on NAND so a modified Haxchi can read it. Follow the usual method to install the Haxchi rom.zip. While still in WUPclient, create a directory to store the firmware in. w.mkdir("/vol/storage_mlc01/FW",644) then copy the firmware from SD to NAND w.cp("/vol/storage_sdcard/fw.img", "/vol/storage_mlc01/FW/fw.img") If it does not copy from SD, you may have to mount the SD. mount_sd() I highly recommend you compile the latest firmware from here: https://github.com/dimok789/iosuhax "make cfw" or "make redNAND" FWIW, Wile I do not recommend doing things you do not fully understand, I have created folders and files all over my sysNAND and USB have not bricked anything. That said, don't mess around and be careful.