which one is broken? My R4DS, or microcard?

method : flash card
product : R4dsoookay so 2 new game come out (rondo and WEWY) however the screen of WeWY is white when i play it, and rondo sword also had some problem...so i try formating the microcard (the same way like i did in FF:CC) and then the WeWY is can be played, however only the intro after that it was blank... and the rondo sword also suffer blackscreen.
and then i try FF:CC, it also has some problem... when playing it was suddenly crash, it has never been happened before i format the microcard.
also i need to mention that during formating my computer had some USB trouble that make it crash halfway in formating.is it my microcard fault or the r4DS?
i already DL the latest firmware...

Your MicroSD nor your R4 is broken, other people have been experiencing problems playing those games too with their flashcarts. Wait for a new firmware. By the way, what brand is your MicroSD?

I've never updated my microSD. ever. but I can still play Rondo fine. Haven't tried World Ends With You though. on a side-note, do you have an R4DS revolution or a different type? I've only seen revolutions but apparently there's another type or two

He has a R4DS, there's no other R4, there's a flashcart called M3 Simply which is very similar to R4.