Mapping the unit after initial set up

How does one attach a drive letter to the main unit after initial set up? I reset ( Complete reset ) my unit
and now I find that there seems to be no way to restore the original designated drive letter to the main unit. For some reason trying to start again from the initial set up process does not work as the computer does not recognise the unit. Many thanks, SBEET

Hi,

You could refer to the following link: https://support-en.wd.com/app/answers/detail/a_id/9323