Now i understand what you are saying Srnet. I aware something wrong after your comment. Yes, it's very hard and I couldn't connect esp32cam and this shield. I research SDMMC in 1-line mode and find the line that says "SD_MMC.begin()" and change it to "SD_MMC.begin("/sdcard",true)", but still i don't use pins. When i extract sd card from esp32cam can i use those pins without any modification? I tried to run my all code without sd card but still not working.