Fresh install T14 ThinkPad: ACPI - Can't tag data node

[soundofthunder]

@_dunce

  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Lenovo model: UMIS RPETJ512MMW1MDQ size: 476.94 GiB
... scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 vendor: Generic model: Flash Disk size: 3.75 GiB block-size:
... scheme: MBR

@_dunce

Did I not make the bootable correctly…

It seems not; and you still haven’t.

I don’t know how you created the Installer USB, whether using Rufus or some other method, but clearly you made the wrong configuration or command choices.

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Important:

Both the installation target (the SSD) and the OS installer medium (the USB) must have a GPT partitioning scheme to successfully install a UEFI based OS.

• Legacy mode in your BIOS should be disabled

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Your SSD has a GPT partitioning scheme.
Your Installer USB has an MBR partitioning scheme.

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You will need to either recreate the Manjaro Installer USB properly on a (preferably new) GPT partitioned USB.

…or…

Create a Ventoy USB instead (recommended);
follow this tutorial (carefully):

[HowTo] Create a Ventoy USB to launch Manjaro (and other) ISO's

Ventoy A New Bootable USB Solution Boot with a Ventoy USB and ISO files are automatically listed in the Ventoy menu. Any ISO present can then be launched and booted directly. The obvious advantage here is that instead of constantly writing a Manjaro Installer ISO to a new USB any time you might need it, every ISO you desire can be stored on the Ventoy USB and launched the same way. A 32GB capacity USB would allow ample space to store several ISOs of your choice; an 8GB capacity USB might …

@_dunce

What I can do next is re-install a third time

It’s time to re-install from scratch a fourth time.

Regards.