GRUB not recognizing filesystem

I'm a new to Linux, and I'm trying to boot the graphical installation of Artix Linux with the XFCE desktop environment off of the ISO artix-xfce-openrc-20210726-x86_64.iso onto my Lenovo Thinkpad T480s. When I boot from the HDD USB that contains the ISO, I'm directed to a blank terminal except for a short welcome message for GRUB and the words error: unknown filesystem By the way, I formatted the USB with Rufus using FAT32. The Thinkpad that I recently purchased had no operating system(s) installed, and the hard drives in the terminal are listed as "hd0" and "hd1". Running the "insmod normal" command that I've seen could be a possible help doesn't work due to the unrecognized filesystem. What is the best approach to go about fixing this? Thanks.