Transfer RootFS kernel panic on reboot

Sorry for the image rather than text.
Tried to move my fresh minimal install of the root file system to the attached USB 3 hard drive and upon reboot I received this mess.

Also I’d like to ask if the roots should go into it’s own partition? If I have a 2 TB drive how large should I make the partition for roofs and should the dietpi user data go into the same partition as root fs?


you can use whole disk for RootFS (partition). There is no need to create small separat partition. You can keep DietPi user data as well on RootFS. No need to store it somewhere else.