Creating a bootable USB drive is not very easy. First, check if the motherboard supports it and if the USB drive itself is supported. If the USB drive is supported, download a specialized program from the internet that creates bootable USB drives. This can easily help you create a bootable disk. Then enter the BIOS boot options of the motherboard. There are several options related to USB booting, and you will need to try them one by one. The key is to use the same mode that matches with your USB drive, such as HDD or FDD mode.