Here's the thing. I have been using for years a pen drive to play Wii games on my Wii U. Then a couple of days ago I had to format it for some other use, and then I formatted it again back to FAT32. Now USB Loader GX is unable to recognise the key and says that the USB device is uninitialised. I tried to format it with OSX and Ubuntu without changing the outcome. When formatting with Windows it sees the key, but as an incoherent set of partitions of several hundreds of GB (my key is 32 GB). It is possible that I screwed up by pressing the update button in the USB Loader GX menu. I cancelled the loader from my SD, and put it back again, but it changed nothing. I tried an other loader (WiiFlow) and it sees the games on the USB key, but when I press "Play" it turns to a black screen. To be honest I am starting to panic a bit. Here follows the output of SysCheck: Thanks for the help.