First post to Ars Technica, please forgive if this subject is already dealt with in another forum, and feel free to relocate me; I'm just knowledgeable enough to be dangerous. I think my issue is ...

Can anyone shed some light on whythe Ubuntu 18.04.1 installer can't see any partitions on the NVMe disc (so I can't add a new partition after the existing ones) but if I hit ctrl-alt-F2 to get to ...

MBR, or Master Boot Record, is a legacy partitioning scheme in Windows that has been replaced by GPT due to several limitations. That’s why modern computers have a GPT partitioning scheme by default.