@mike_nv
thanks for reply.
in the link https://forums.developer.nvidia.com/t/how-to-boot-from-nvme-ssd/65147/15
sudo rsync -aAXv / --exclude={“/dev/“,”/proc/”,“/sys/“,”/tmp/”,“/run/“,”/mnt/”,“/media/*”,“/lost+found”} /mnt
only copy /dev/“,”/proc/“,”/sys/“,”/tmp/“,”/run/“,”/mnt/“,”/media/*
can i copy all the rootfs file?
because i want to copy all the rootfs files to sd card. then, delete the rootfs in emmc, the emmc have enough space to use.