Hello @lilipeeeee
1) "LPC4357使用SD卡最大支持到多大？" 256G？128G？
->> You need first confirm which SD card you want to use, then test, because for different manufacturers, SD card not the same.
2) There is SD card demo under lpcopen, you can refer to, download from:
https://www.nxp.com/design/design-center/software/software-library/lpcopen-software-development-plat...
About Filesystem demo, you can find from arm, refer to thread:
https://community.nxp.com/t5/Processor-Expert-Software/LPC4357-Filesystem-demo/m-p/1431994
BR
Alice
