Lately my DX has been having problems writing to the SD card. For example Vingette will take a picture and then not be able to save to the SD card and it will spit an error saying it can't write to the SD. Another example is when launching SNESoid it couldn't read the SD and crashed...taking the entire /roms folder with it....
I'm using a new class 4 16 gig card, fully stock DX.
I'm using a new class 4 16 gig card, fully stock DX.