Booting reComputer J2012(Jetson Xavier NX) from USB-connected SSD

I am trying to boot from a USB-connected SSD since the eMMC on the reComputer J2012 (with Jetson Xavier NX production module, SD card not accepted, 16GB eMMC available) does not provide sufficient capacity.

As described in the URL above, I wrote the OS (JetPack 4.6.2) to the USB-connected SSD using Nvidia SDK Manager (ver. 1.8) and tried to boot from it.

However, when I try to boot, the “Nvidia” name and logo screen remains and does not proceed.

How can I solve this problem?

Any advice would be greatly appreciated.