Just to be clear, I'm not a noob and everything was working perfectly before the format. Basically I had redNAND (Mocha) running and somehow ended up with some undeletable ? on my system menu so I decided to ditch redNAND and start again. To do this I formatted my Wii U which went fine, took me a while to recover my NNID but now everything seems to be working perfectly so I redownloaded Brain Training then hit loadiine.ovh to reinstall haxchi and that's where my troubles started. Both loadiine and wiiubru do exactly the same thing, they load the payload, reboot the menu then screen goes black with the message SD Mount Failed. This is the exact same card I was using before the format, I haven't touched the card at all (didn't even remove it from my console during the format) and my PC reads it and shows everything as it should be perfectly. I've also tried 3 other cards in it and they all do the same thing, I've tried formatting a card and getting HBL fresh, I've tried using wiiubrus SD setup thing, I've tried reading the cards in vWii mode and I've tried blowing in the SD slot in case it has dust in it but it seems as though formatting my console has done something to the SD Card slot. Anybody got any ideas please?