need some help

Hi i am using a 8gb micro sdhc card for my R4 sdhc card, from the files i have i suspect it is using N5 firmware. I tried upgrading the firmware to N5 latest version but it kept showing the loading screen and hanged there. I have no problem with the previous firmware just that lately when i try to add games into it the card will show untitled and cannot play. which i will then delete all games in it and then recopy all the old games and new games into the sd card and then all the games will work. why is it so? and alo like to know why the latest N5 firmware i cannot use?

Why are you using N5 firmware? Use specific firmware to your type.

i have check all the files in my old sd card ..all the files is the same as N5 firmware.

They could still be slightly modified. Just get the regular firmware.