So, I recovered my old Wii (4.1U) which was hacked, but didn't have the usb drive that I used to use so I wanted to recover it so I tried to re-hack it.
I'm using a 32GB SD card formatted as FAT32.
I used the site wii.hacks.guide to install the cIOS (38, 56, 57, 58 on positions 248, 249,250...