Dear Constructor.
Thank you for your insight. After a good night sleep I have noticed that there is a line in the log....
So I killed the windows Vm and lauched the mover.... Voila.. it chrunched one iso... although the size of the cache remained the same... almost full.
(still a mistery, but that seems more like along the lines that the cache is not configured properly) (Any advice highly appreciated)
Howerver., i was able to launch my broken Ubuntu VM and the the screen with the journal error turned that the journal rebuild itself and it booted...
So I am over the moon. This is amazing...
Aside
I know that the usb 2 is more stable and I always put the flash drives into 2.0.
That would make sense. I never ran any docker containers. Just two Vms. One windows and one Ubuntu.
P.S (Linus from LTT was right... This community is truly amazing. Thanks to everyone who helped.)
Radislav
UPDATE: I
I think i have solved it. The cache for domains was set to prefer. That s the reason why it was full. I switched it to yes and then invoked the mover. The mover moved almost everything out and now I have a healthy 80GB cache utilization.
I have learned a lot. Many thanks. You can mark this as solved.