For People (like me) who got previously "Unable to mount SD Card" OR "TAFN3DS sd card áb áb áb áb áb áb áb áb" OR just white freeze.
And ONLY for people (like me) who use a SD 2GB Sandisk (Normal/Ultra II) or less (To keep Original Nintendo DSi BIOS)
Here is finally a solution :
Do NOT use any...