How to install motherboard drivers from USB?

Oct 3, 2018
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I just got a brand new pc, but there's no optical drive. I've used my laptop to put the motherboard drivers onto a usb drive, but I cannot get my system to download them. Every time I boot my PC, Windows asks me if I want to troubleshoot or use a device. If i click use a device, it asks whether or not I want to use the harddrive or usb. No matter what I do, even with troubleshooting, I end up at a screen that says I need to, "Reboot and select proper boot device or insert boot mdeia in selected boot device and press a key."

The motherboard is Z370-A Pro from msi.