i reached this step from the installation guide that shown down in the picture yet i couldn't understand it , can i get some
guidance as to how i can solve this ?

https://imgur.com/a/TO4e9DY

and when i click on mount disk 2 as shown on the guide it simply open this window for me .

https://imgur.com/a/ZRgEJK6
i hope the pictures got to appear to everyone