"Custom: Install Microsoft Server Operating System only (advanced)" for a clean installation on a new drive. Partitioning : Select the unallocated space on your drive and click to begin the automated installation process. Admin Password

You cannot run the ISO directly to install an operating system on a blank server. You must create a bootable USB drive.

The ISO is approximately 5.4 GB , requiring a bootable USB or a dual-layer DVD for physical installs.