I'm looking at the latest VirtualMan (XII) 256Gb image. Like the one before it (XI), this image will not boot. The card image was written first by uNetbootin 6.6.1 and then by Rufus v3.3 without errors. I have tried two different 256gb cards (Patriot LX and SanDisk Ultra) on two different Pi 3B+ boards and the result was the same.
Kernel Panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)