Successful. I did the magic trick with High Sierra and I seem to have a working drive. All will become clear after time. I used Retina Early 2013 for this, but I have another problem. It's been dragging on since basically the beginning of my MacPro6.1 adventure.
The external drives in the ASUS TUF Gaming A1-USB-C 3.2 and UGREEN M.2 NVMe SSD cases are monstrously slow, unresponsive regardless of formatting. Both two are WD BLACK SN770 - 1 and 2TB. The second was used as a Mac Pro drive and at the moment is behaving equally nightmarishly. Speed sometimes over 300MB and more often 2MB, 24, 32 etc. Massacre. How can I format it? I have the A1342, A1990, A1481, A1347 and A1425 here. Apart from the A1481 none generally have problems with external drives. Well now after formatting these two WD's they already have. Where could the fault be?