Enable the rpmfusion repo. Download it from https://rpmfusion.org/Configuration
wget https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm
rpm -i rpmfusion-free-release-8.noarch.rpm
yum install fuse-exfat
mkdir /media/usb
mount /dev/sdx /media/usb #Where x is your device name i.e sdd1