The "PCIe x 16" probably means that goes with one of the previous, much more expensive, Jetson boards.
This $99 Jetson appears to have no direct support for any type of M.2 drive. Maybe some M.2E PCIe to SATA adapter board, if such a thing exists.
This $99 Jetson appears to have no direct support for any type of M.2 drive. Maybe some M.2E PCIe to SATA adapter board, if such a thing exists.