Help here pls.! ASAP

I got a problem here on my r4sdhc. I put a game on my r4 then removed my usb put on the flashcart then after the loading screen it goes black, just black screen. I next thing i know it says delayed write file bla bla bla my sister experienced this too just a few days ago hers was reformatted copied the back up and done but mine was diff. i tried putting my backup. but for some reason i cant access my flashcart says G:\ has been corrupted... I searched for solutions and microsoft says i off my caching sumthin tried but i cant just right click on my flash cart on the pc... tried using my sdformatter but just hangs in white window... and on another site another one had the same problem, they say it was eaten by a virus...

Any idea on how to fix this thing?
I asked romu for help coz i know u guys can help...
Dont let me down pls... T_T

 

One possible outcome...

Your sd card has died

Mine did that in a filed attempted at dumping gta china townwars..

They don't last long, get a new one.

 

So like, about how long does it take to die? Mine is still working but I've read some topics about this and now I always try to backup my SD or does it depend on the brand?

 

how come it died while i only got it like for months?

 

Starting and stopping constantly.

Think about it-you play it for 5 mins, turn it off, 10 mins loater your back on...

If your like me, it's pluging it into a pc to add new games, or your dumping games...every 2 mins.