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UUP dump ISO size
I choose only Pro version and my Windows ISO size is over 5 GB instead around 3-4 GB.
I choose only Pro version and my Windows ISO size is over 5 GB instead around 3-4 GB.
Yep. That's because UUP Dump uses install.wim (uncompressed) instead of the compressed install.esd file. On the last option screen before downloading the script, check the box for Use solid (ESD) compression.
That 5GB sounds about right for an ISO that contains an install.wim, as a UUP dump ISO will by default. The MCT makes an ISO that has a more compressed install.esd, that would be in your 3-4GB expected range.
If you need to use UUPDump, then when you get to the 'Select your download options' page there is an option (by default not ticked) to make an ISO with an .esd.