Can I flash the image in the udisk or m2 hard disk?
Please reference document “Flashing to an NVME Drive” steps to flash on your TX2-NX.
After boot up, please remember to set boot-order to NVMe from uboot. (Need connect uart on your Jetson board).
I see there is " Flashing to a USB Drive". Dose TX2-NX support this function?
If “tx2-series” is not listed on it, then it is no support.
My carrier is P3450. It seem to no ssd slot?
Looks like you pick up a wrong carrier board here.
My carrier board is B01 not B02. Can Tx2-Nx use it?
No, that’s not supported,