Just going to point some things out to you as you are new here
1. It is against gbatemp.net rules to bump threads you have done this twice in this one thread. Continue to do so and you will be suspended or banned permanently from the site
2. This thread should be in the homebrew section not In the wii u hacking and backups forums.
3. Learn to search the site for answers before posting threads you question has been asked and answered many times.
4. This goes along with no. 1 people will eventually answer your question don't bump and give people time to answer. You may get an answer straight away or you may have to wait a day or so but you will eventually get an answer.
5. Finally you should have posted in the official retroarch thread where by you will probably be answered quicker or even better you could have checked out the previous answers to your question in that thread as like I said it has been answered many times