I was able to setup and run the Xavier NX from the hard drive, following the guide here: https://www.jetsonhacks.com/2020/05/29/jetson-xavier-nx-run-from-ssd/
However, it seems that the SD card is still required, since the boot is still done using the SD card. It seems that as of now is not possible to do a full boot from the SSD. Is this correct? Are you planning to provide such functionality.=?