I have a STM32F769I-EVAL board. I am trying to look at the demo and see if the chip can do what I will want it to do. However it doesn't seem to be seeing either Micro SD Card. Is there something I need to do to the board in order for this to work?

[Tesla DeLorean]

Pretty sure both SD Card slots worked out-of-the-box. Make sure nobody changed any of the jumpers or solder bridges related to the motor boards / use-case.

Not sure how well built, or complete the functionality is with demos.

STM32Cube_FW_F7_V1.16.0\Projects\STM32F769I_EVAL\Applications\FatFs\FatFs_uSD\readme.txt

I'd watch which memory was being used for DMA mode operation.

Top side microsd is the primary.

Definitely had both working on the bench here.