Thanks for the messages.
I have downloaded again but still the same error message. I deleted the previous 19.11.2 files and downloaded them again (from here: Manually install Fairphone OS for the Fairphone 2 – Support ) I extracted all from the Zip. So I am not sure why I get the ‘cannot find file path’ error.
I will see if I can try AnotherElks’s ideas, thanks.
To answer your question I downloaded the 21.03.0 files here: Manually update Fairphone OS using Windows – Support, but I guess it’s not the correct thing, thanks for letting me know! Though I was hopeful when I got further than my 19.11.2 manual attempt.