Hi there,
I was referring to the threads were I see folks using Nvme SSD, placed in an external enclosure kit attached to the linux host, and installing the flash that way(flashing the external NVME) then placing it in the carrier for boot install.
Look at some of the other threads on the topic and you will see. This is a SSD so adding it as D:Drive for example and then installing or updating the disk image that way?
Just some thoughts as I see this is an issue a lot of time.
HTH
GL 
PJ 