On Wed, 6 Feb 2019 09:48:32 -0500, Big Al wrote:

On 2/6/19 6:45 AM, Mr. Man-wai Chang wrote:

Keep a copy of build 1803's ISO. You might NOT be able to grab it again.

I wish I had!

Heidoc.net has all of the Windows 10 ISO files available for download
(from Microsoft), going back to July 2015. Grab them all, start a
collection.

https://www.heidoc.net/joomla/technology-science/microsoft/67-microsoft-windows-and-office-iso-download-tool