I want to download windows 10 iso file, but internet is slow.

Latest windows 10 may 2019 update has been released and I want to download and install it now, I don't want to use "windows updates" way, as MS is slowly rolling out May update, I don't know when it will be available at "windows updates".

So, I have decided to download win10 ISO file to install it, iso files are helpful in other ways too, like, if in future my windows install gets corrupted, I can easily re-install win10 using bootable USB and ISO file.

But the ISO file is way too large(4.5GB+), I have a limited data plan(of 1.5 GB per day),

So,how can I download win10 ISO?

(Note: I earlier thought of downloading it slowly, like 500-600 MB per day, or in parts, but download link expires after 1 hour, and we can't download it in parts)