I just received my EZ Flash IV (the newer microSD version) and I followed the instructions here (http://ez-flash-iv-review.over-blog.com/2014/06/a-beginners-guide-on-how-to-set-up-the-ez-flash-iv.html) on how to set it up. I'm using a GBA SP and a 16 GB Sony microSD SDHC card.
Everything went...