As I thought that Step 3 was only there to install the Superuser.apk i just skipped it (mistake no. 1) and wiped the whole thing (without making a backup --> mistake no. 2) and tried to install the Maximus HD Rom which as I am still S-On of course didnt work. So I wiped again but really careless and made mistake no. 3: wiping the whole thing instead of just a few partitions like system, cache,....
So now I have my device S-On, theres really nothing on it exept TWRP but there (and in other recoverys I tried) the USB mout doesnt work so I cant get a new rom on it So I tried to push it through fastboot but I cant find a fitting command.
Any advice what I can do to either get the USB work in the recoverys or push it through fastboot and which rom works without S-Off?
If you need further infos Id like to give those!