This is not "bad USB" cards this is fully due to Pioneer fragile update system and their failure to clarify on this issue or to fix bugs with their product.
I have tried half a dozen SD cards all different brands and several USB cards using Window 10, MacOS and Linux with no success.
If anyone here has enough computer experience to use dd to image a SD card or USB drive that does work for this it would be appreciated. While I love the product I have avoided other Pioneer products because of this issue. Unfortunately both BT and android auto are starting to have issues and I need to upg
