hello shua1zh,
may I know which JetPack release you’re working with.
you may try to put APP partition at end offset, then it can be resized according to the SD card capacity.
please generate the SD card image using create sdcard image script; then write that image into the SD card for using.
such script file makes sure to create APP partition at the end of the disk and latest resizing service will take care of resizing to occupy the unallocated memory of the SD card.
please also refer to Topic 73032, and Topic 76807 for similar issues.
thanks