Yeah you can modify nvbackup_partitions.sh and nvrestore_partitions.sh to make it work for NVMe SSD. l4t_backup_restore.sh works by recovery boot the device to a initial ramdisk, which can communicate with the host via SSH. The host basically runs nvbackup_partitions.sh to backup images and nvrestore_partitions.sh to restore those image though SSH and NFS. You can start with modifying those script by replacing all mmcblk0 reference with nvme0n1
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