- Download a .raw.xz file
- In this case, it was https://download.opensuse.org/distribution/leap/15.4/appliances/openSUSE-Leap-15.4-ARM-KDE-raspberrypi.aarch64.raw.xz
 - Yes, I also downloaded the .sha256 file and ran sha256sum against the downloaded image to make sure the image file was not damaged during transfer.
 
 - Open a terminal session and become root
 - Determine which device the SD card is
- In this case, it was /dev/sdc
 
 - Copy the image file to the SD card
 
 xzcat /home/david/Downloads/openSUSE-Leap-15.4-ARM-KDE-raspberrypi.aarch64.raw.xz | dd bs=4M of=/dev/sdc iflag=fullblock oflag=direct status=progress; sync