Correct, the ISO shows 4526MB in Power ISO. But when it goes to burn, it gives the error message not enough space. I believe the DVD-R though it says 4.7GB but windows explorer properties shows 4.3GB
ok, so i was able to fit Windows 10 20H2 onto a 4.7 GB dvd-rw disc, by shrinking the size to 4.05 GB. so i'm not sure exactly which way would be the quickest or straightforward, but one route is to use ntlite to add the image directory, which then should show more than one windows 10 version. what i did was delete all of them in the same area, except for windows 10 professional, but i think i took some other steps that may or may not have been necessary, such as converting to wim, then i think i clicked process process or something that created the iso. i dont remember exactly, but i believe when i used poweriso to convert wim back to esd ( after extracting the updated iso ), for less space, i then deleted the install.wim file, leaving install.esd with the lower size, then i opened up the directory again in ntlite, and created an iso, burned to disc, and it was able to boot off it, although, i only went as far as the screen that mentioned upgrade / custom install, as i didn't want to actually use the tested computer to install, but i think it would install and work fine. so the 4.05 GB size of the updated iso, is only for windows 10 professional 64 bit with version 20H2, as all the other versions, education / home, were removed.
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I want to burn these files into multiple dvds. For example, 3 dvds having size of 4.7gb OR 2 dvds one can be 8.5gb in size and another one can be 4.7gb in size. Moreover, i want to burn these in continuous manner. So that during installation when dvd1 is finished, the pc will ask for next dvd in order to continue.
I tried using winrar to create the archive in 4.3gb sizes but in this case, during installation, i will have to first extract files from archives (in my hard-drive) and then can start installation, which I don't want.
usually a setup that spans multiple disks requires certain files on certain disks and in a certain format. Without knowing the exact specifics it's going to be very difficult to organize your disks. If the setup is very flexible that way, you could us a disc burner app that supports disk spanning such as, CDBurnerXP.