How to download a windows 10 iso that fits onto a single layer DVD-R /RW

 I use a dvd-rw to store the latest image of windows 10.

In the recent update the size of the iso file was too big to fit on a single layer disk and the recommendation was to write to dual layer.

However dual layer dvd-rw doesn't exist and I don't want to create more waste.

So here's the method I used ...

Rufus download method...
https://pureinfotech.com/download-older-iso-windows-10/

I used the option to download via browser.

Direct download link analysis:

March 2017 - just right

https://dsprodtsblobdub.blob.core.windows.net/dsts/1E70BD11-3D71-471A-AAF0-7675DA88F55F?sv=2015-12-11&sr=b&sig=kEit06nuF4h3R2pK71FILQkrqVZgALFXzDQns25fiMI%3D&st=2021-04-08T17%3A30%3A22Z&se=2021-04-10T17%3A35%3A22Z&sp=r&rscc=public%2C%20max-age%3D259200&rscd=attachment%3Bfilename%3D%22Win10_1703_N_English_x64.iso%22

July 2020 build (4.9GB - may just fit!)

https://software-download.microsoft.com/db/Win10_2004_EnglishInternational_x64.iso?t=aae57666-d259-403a-aa29-75cc3a78936b&e=1617975838&h=6466e7113d27bab35de9221b6cec2313

October 2020 build windows 10 International English
Verdict: too large for DVD-R/W

https://software-download.microsoft.com/db/Win10_20H2_EnglishInternational_x64.iso?t=79540047-6d75-461e-a7f5-a3f5bf358129&e=1617972815&h=8f5914aaff3c79046b62333bee14a461