Hi,
Thanks for your reply and sharing.
Microsoft distributes the last upgrades of Windows 10 builds in the install.esd format. In addition, recently in all distributions of Windows 8.1, Windows 10, instead of the install.wim file, install.esd is located. The file size with the esd extension is smaller, because it is compressed more strongly (a new type of compression is used). This compression type packs the Windows installation files even more and, as a result, the size of the install.esd file becomes less than the install.wim file by 30%.
The inconvenience of using the install.esd file is that Dism refuses to mount this image and SCCM hasn't caught up yet. Accordingly, in such an image it is impossible to inject drivers and updates. Therefore, in this situation, the easiest way is to use DISM command to convert the install.esd file into install.wim and then copy this install.wim into the sources folder, delete install.esd and try the import again, it will now be successful.
A similar thread for your reference: Importing a Windows 10 1903 OS Upgrade Package to SCCM
Thanks for your time.
Best regards,
Simon
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