The latter is important because the main solutions of How do I place a bootable ISO on a USB drive? don't work: Rufus, for example, doesn't offer the possibility to do it on a hard drive partition (I just tried now, the 'Device' list is empty when I insert a USB flash drive, here it works)
More generally, how to write a bootable ISO to a disk partition with Windows? I'd like to put the Windows 10 (or 7) bootable ISO installation disk into an external disk partition (and not into a USB flash drive).
I have already read How to write bootable iso to a partition? and How do I place a bootable ISO on a USB drive?, but here it's a bit different:
