How can I install windows installation ISO to a partition on an external hard disk?
The hard disk already has a Ubuntu installation and grub on it, and another NTFS partition I use to store personal files. I want to start the windows installation process from the hard disk, but windows windows USB download tool only allows pen drives.
What I think so far is to make a NTFS partition and copy contents of the ISO to the partition and edit the grub boot loader to include the partition. But can someone mention the steps that would be needed to do this, I don't know how.
Edit: Why I want to do this is because I don't have a pen drive and want to install windows to a computer that does not have any windows installation on it. otherwise I can just run setup from within windows itself.