Hello Răzvan,
thank you for providing this question.
I am a seasoned Windows expert with almost a decade in usage and support experience and hope to resolve your problems quickly.
- Create the RAID inside of your motherboards raid controller settings.
- Run the installation through normal means so the with the Media creation tool created USB. During drive selection if necessary click "load driver" and load the necessary driver for your RAID controller.
Visit your mainboard webpage for a detailed instruction and RAID drivers if necessary.
Install Windows 10 on RAID 0 example guide:
https://www.biostar.com.tw/app/en/support/faq_c...
ASRock Classroom video on Raid controller drivers and SATA drivers:
https://www.youtube.com/watch?v=qg1Vvh67Efw
If you consider your problem solved it would be very good if you marked the answer which helped you so others can find and use this thread.
If this didn't solve your problem or you need further assistance please answer in this thread and i would be happy to help.
kind regards
F. Grobusch