Download the required image
Using Rufus (Windows)
Download Rufus (preferably portable)
Launch Rufus.exe
USB device will be selected automatically, if not you can select it in the dropdown menu
Select disk file
Press start
Confirm disk erase
Using dd (Linux)
In terminal run:
lsblk to see all block devices, your USB drive will be /dev/sdX
sudo dd if=your_image.iso of=/dev/sdX bs=1M status=progress; sync