Help upgrading the NVMe M.2 Boot Drive with larger and faster M.2

Hello,

I have a new Acer Predator 300, and wish to upgrade the existing 512GB NVme M.2 to a faster and larger 2TB M.2, and add a second 2TB M.2 so I can use this for creating big data risk algorithms for work, play games, and so this laptop can ultimately replace my much older desktop. 

I successfully installed the 2TB M.2 in the second slot, and the laptop recognized it. As seen in the Disk Management image below. Then I successfully installed the free version of Macrium Reflect 7 and was able to clone the 100GBs on the 512 GB M.2 to the 2TB M.2 in 9 mins. However, when I loaded the laptop Bios to change the boot sequence order from the 512GB to the new 2TB m.2, I was confused by the wording in the boot priority order. As seen below it does not provide unique listings for each drive; just "Windows Boot Manager", which I am not use to seeing. I assumed item 1 is the 512GB, and followed the typical BIOS commands prompts to change it to item 2, save, and then exit. I turned my laptop off and replaced the 512GB with the second 2TB NVMe M.2, but a system error occurred. At this point, I am trying to identify the root-cause and assume either 1) the cloning was not completed correctly, or 2) I missed something when trying to change the boot sequence order. I will go back into BIOS again to try to change the boot priority order, but this time after making the change, I will look at the Disk Manager to see if it shows the 2TB M.2 as the boot drive, as seen in the Disk Management image below for the C: drive.  Can anyone offer any help?