Hi again, very valuable insight!
Concerning the files on the system drive they mostly are the installed software and Windows itself.
I am since many years trying to keep the system drive just that, for the system only. Which includes the installed software.
But all my work files and such are located on a second data drive, which can be unplugged and inserted into the new laptop.
So what I am trying to get my head around is how this fits together during the transfers...
I will try the conversion using my Synology NAS as the target storage for the cloned system.
I hope that the conversion only deals with the system drive or that one can choose which other drives should be included?
In the end I will have a physical laptop (the HP ZBook not yet started up) with Windows 10 on the system drive and the old 2TB data drive in the HDD drive bay.
On the data drive there will be a dir with my virtual computers, which now also will have my converted old laptop.
Or so I thought up until a short time ago...
Now I think it might be better to put the converted old laptop on a separate portable drive and only hook it up when needed. It fits easily in my laptop bag.
It will probably be very seldomly used anyway. It is just a backup for stuff I might have forgotten to transfer to my new hardware.
In any case I will make a separate virtual drive for it to use as drive D:, where all extraneous data files (virtual computers and videos mostly) will be missing and only the work files remain in their normal places.
Apparently (found on the web) one can copy files from and to a vmdk drive using 7zip! Provided that the virtual computer it is attached to is not running of course.
So I can fill it with the data I want easily.
Thanks for your help and advice!