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#5991
Good morning Ken.
Yes, it's an odd one. All my other laptops, including a newer UEFI Dell, can see and boot from that usb NVMe without issues. It's just the one laptop I wanted it for as a Reflect rescue usb that couldn't see it! Anyway, all sorted now and it boots fine.
As for Dell charging settings in the bios, I leave all my Dell's set to 'Adaptive (Recommended)' and never had an issue.