SOLVED - SD card on stm32f7-discovery board problem ?
THANKS TAREK BOUCHKATI...
The linker files was the same but the solution was the missing linker instrulction as you can see in the attached images
I did try to google to learn was happend when setting -specs=nosys.specs -specs=nano.specs but can not see how it can influence on FATFS ..
But you are my hero today ;o)
Hjalmar