What does "BF" description on the Sandisk SD Card means?

Hello guys,

I’ve bought a Sandisk SD Card on Amazon and it comes with the “BF” description next to “10” class symbol, like you can see on the image below. I’ve search everywhere and I didn’t find anything about it. This card just can’t be read by the retrogame RG35XXH, I tried many ways and was unsuccessful.

Someone knows what this “BF” description means?

Thank you.

Hi @Coyshiro
Have you opened a Support Case? If not opened, for more information, please contact the SD Technical Support team for best assistance and troubleshooting: