Hmmm didn't know about that ! Very interesting! Thank you !also evaluate back to home.
https://help.mikrotik.com/docs/display/ROS/Back+To+Home
Yes !Did you do port forwarding on the NAT device as well?Yes it is behind NAT and does not have a public IP address.
Changed it to forward but still the port remains closed...input ≠ forward
/ipv6 firewall raw
add chain=prerouting action=drop
/ipv6 firewall filter
add chain=forward action=drop
Yes for some reason it wont do it ...Did you format the USB disk to Fat32?