A SSD card can NOT be hugged by M.2 E slot

It is said M.2 E slot is only adaptive to a wireless-like connector

That is correct, the M.2 key E profile on the Jetson TX1 devkit is typically used by wireless adapters (while SSDs typically use the M.2 key M profile).

Check out the Auvidea J120 carrier board though. It features an M.2 key M slot for supporting SSD.