main.c -> BSP_SD_DetectITConfig(SD_INSTANCE) stm32h7xx_it.c -> fx_stm32_sd_driver.h -> EXTI9_5_IRQHandler(void) -> SDMMC1_IRQHandler(void) new Drivers/BSP -> add *.c *.h -> add to path modify app_filex.c modify fx_stm32_sd_driver.c -> × unaligned_buffer = (UINT)(media_ptr->fx_media_driver_buffer) & 0x03; -> √ unaligned_buffer = (UINT)(media_ptr->fx_media_driver_buffer) & 0x1f;