Thank you for your help. I realized that you do not use the Arduino 022 to compile. In fact, with your compilation, the Arduino bootloader is deleted because your installation uses atmega 328, but not exactly the Arduino UNO system. It is easier to understand and modify if necessary before compilation. I thought I could use my UNO + Ethernet / sd shield. I'll buy a Arduino Nano to test. I already tried the SIO2SD of Pigoola and it was very good.