Hello,Clock Config of SD is correct and it is located in "SystemClock_Config" function.Please find attached this lien of "FatFs_uSD_Standalone" application on STM32L552E-EV can help you :https://github.com/STMicroelectronics/STM32CubeL5/tree/master/P...

Hello,Please find attached the example PWR_STANDBY on NUCLEO-C031C6 can help you, this example works on wake-up the system in pressing the User push-button which is connected to the wake-up pin PWR_WAKEUP_PIN2

Hello,this config of SD card on STM32L552E-VE board can help you. If you use SD card for the application 'FatFs_uSD_Standalone' must enable SDMMC1 global interrupt.I will be waiting for your feedback.