Tried Rufus for that, and even tried the steps on the hekate method on that other link.That flawed GPT issue should probably be addressed. You’ve got something funky going on there. A low level format will guarantee that it can be fixed (or there’s something wrong with the card.)
It just won't boot properly; won't even let me boot to hekate or atmosphere on the new card. It just keeps kicking back the "Invalid gpt signature" error.
It just tells me press power for reboot. It won't even let me launch the hekate payload, either.