I just copied a image file of raspbian buster lite to a micro sd card. I used the image program Win32DiskImages under windows 10 64Bit for this job. Not the first time i go on with this stuff, i removed the sd card caddy with the micro sd card from the card reader and put it to the raspberry4. I got following error:
Kernel panic – not syncing: VFS: Unable to mount the root fs on unknown-block (179,2)
No matter with how many Cards you will try this, you could find similar results in the web.(https://www.raspberrypi.org/forums/viewtopic.php?t=12245)
At the end: after writing the image, removed the card at first via windows function: remove card with icon you can find lower right near the watch/datetime.