@Mrgud Yeah, I’m not sure why it changed. Maybe because I had switched which port it was plugged into. Each time I use Diskpart I list disks, partitions, and volumes to ensure I’m acting on the correct on. The X5 drive is the only one partition any where near 1TB I have connected (32GB Flash Drive, 2TB internal drive with 400GB for bootcamp and 1.6TB for OSX) so I can verify by the disk/partition/volume size.
I did about 4 tests as part of following your directions. One involved deleting the partition as you said. I did that and didn’t touch the EFI partition, but got an error saying that the EFI partition was detected as NTFS and needed to be FAT32, causing me to run Clean All to get rid of it assuming Windows would create a new one, but maybe it doesn’t considering an EFI boot doesn’t show up for it on the option start now. How does your external boot show up in the option restart? And do you have an approx 500MB System partition on that drive as well as your primary partition with Windows 10?
Can’t use a DVD since the install file seems to be over 4.whatever GB in size, but I don’t think the USB is the problem. I already disabled SIP as one of my initial troubleshooting steps several days ago. I’ve also enabled boot from external device.
You are correct, no errors through the install process up until it restart to boot from the new install. That was where I got the BSOD. I have Win10 working on an internal bootcamp partition and an external USB-C SSD. It’s just the TB3 NVME SSD that’s giving me problems.
Since I’ve gotten SIP taken care of, the only thing I can think of trying again is to format the X5 drive from Disk Utility again to try to get it to show up in diskpart, clone the USB Win10 over, check that the EFI is FAT32, delete the primary partition again, and if that doesn’t work run a Clean command to wipe everything and try again (Clean should only take ~15 minutes).
EDIT: Recreated my internal bootcamp install and the install USB. Only the USB is appearing in Diskpart when I boot from it still. However, everything shows up when I boot into my internal Bootcamp partition.