Même soucis pour moi j'ai ce pad là : https://www.pdp.com/en/shop/controller/pdp-wired-controller-purple
il est bien identifié à l'étape qui affiche le nombre de manettes connectées, mais lorsque je dois garder le doigt appuyé sur l'un des boutons, rien ne se passe. Est-ce un soucis de compatibilité qui pourrait être corrigé dans de futures versions ?
merci beaucoup,
JB
Ok at the end I have downloaded diskinternals desktop reader. Did a copy of the roms on my computer. Formatted the SD card again with SDformatter and installed the last version of Recalbox. Then I plugged a USB stick on the Pi to use it as harddrive for my roms. All working great 
Only weird thing now my Xbox controller keeps blinking. It wasn't doing that with the previous version of recalbox.
Thank you for your help, sorry if I am asking simple question, but I don't find information regarding this in the wiki. The SD card already has the previous version of recalbox running. When I plug the SD card to my computer, I only see one partition called recovery (about 462MB). Should I override the files there with the new one from the last recalbox package?
thank you again,
@voljega thank you for the quick reply! Is there a tutorial to keep the current set of emulators and roms currently on the SD card? Or can I just copy those specific folders and put them back after the upgrade?
thank you,
Good evening,
I just received a Recalbox from a friend. It is running on v3.3.0-beta 17. I would like to update it to version 4, but in the menu it says no update are available. Is there something to be done to force the update?
thank you