Hi Kai,
Got it, thanks. Ensure your USB is the primary boot sequence in the BIOS menu. Then please unplug all other devices from the USB port, except your USB drive, and reboot your PC.
If you get the same error, then kindly proceed with that Diagnostics & run a hard drive test to identify the issue. If it identifies a hardware issue, then I suggest try another USB drive; a new one would be good.
You might also try going back to your BIOS menu & see where you can change the "Legacy Support" & the "Secure Boot" status. Meaning, if the "Legacy Support" is "Disabled", change it to "Enabled or vice versa, whichever is applicable. Do the same with "Secure Boot". Reboot your PC again to USB & see if it passes through.
To access your BIOS menu, repeatedly press F10 to get in. If that won't work, then press F2 or F6.
I hope this helps. Let me know how you go. Thank you!
Sincerely,
Paul A.
Independent Advisor