Hi vasteofilo
If that drive is working when you choose RAID, that is wrong, because you would not have a RAID Array set up on your PC, honestly, at this stage, I think your best option is to contact MSI support and have them guide you through booting form a USB on that motherboard, because as far as I see all the settings were correct and still it did not boot correctly
https://www.msi.com/about/contact-us/
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