Je trouve ce message sur ma télécommande
Je ne sais pas comment le gérer
Anyone can help ?

A problem with the SD card maybe? I would format it again and see if it helps.

Hi there, please try to format the SD card via the app, if it doesn't help, try to connect the drone to PC and format the SD card via PC.
Please note to back up the important files before formatting it. Or you can try another SD card.
Please keep us updated if the problem persists, or you can also contact our support for a further help, thank you. http://www.dji.com/support