My phone suddently stopped being detected by my phone.
So, I hard formatted it in windows, in FAT32.
It didn't work, but windows detect it well, I have no problem to read / copy files in it.
I tried my SD in another phone, and it works.
I tried a new SD in my phone and it works.
I don't really know what to do, it is a 32GB SD, so I would like to keep it.