I search all over AD and nothing. I have USB Loader GX r722 as a Channel in the Wii Memory (WAD) When click update in the USB Loader it says "Can´t create directory" and it won´t update. I already delete de config folder in the SD and nothing. Anyone had this problem?
Is the lock on your SD card? that would be my first place to look. Second would be to check path in settings for update and make sure the path exists.
After r520 you can update from the channel. I solved it, I removed the .dol from the homebrew channel because I only use USB Loader as the channel (WAD) but forgot to update the path of the update from SD:/apps/usbloader_gx to anything else so i created the folder SD:/apps/usbloader_gx and that's it