Can't save log on micro sd (Mission Planner / mini Pixhawk 4)

Hi everyone,
I am using a mini Pixhawk 4 for a boat project and after few test i wanted to rewiew a log but when i clicked on “download DataFlash Log Via Mavlink” on Mission Planner nothing appeared. Same if i plug the micro SD on a computer.
I tried to change settings such as [LOG_BACKEND_TYPE], [LOG_BITMASK], [LOG_DISARMED], [LOG_FILE_DSRMROT] but it changed nothing.

This happens to me from time-to-time and usually formatting the SD card fixes it.