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Create Windows 10 2004 Installation USB in Ubuntu 20.04 LTS

First of all, we need to download Windows 10 ISO from Microsoft in Ubuntu 20.04 LTS.

We are required to install wimtools by the following command.

sudo apt install wimtools

Create GPT for the USB drive and format it in FAT32. Make sure to set the partition as MBR and BIOS Bootable at Disks (Gnome Disk Utility).

Since install.wim under sources directory at Windows 10 2004 ISO is greater than 4GB, we need to split the install.wim into smaller size files or optimize the size of the file.

We have two options, either Option 1 or Option 2, to do with the install.wim file. Option 2 requires a longer time to complete. Optimize makes the file size smaller, it is about 3.3GB after the optimization.

Option 1 - Split

wimlib-imagex split install.wim install.swm 2000

Option 2 - Optimize

wimlib-imagex optimize install.wim --solid

It is recommended to copy all the files from the ISO to another directory, namely splitted. Make sure to delete the original install.wim under sources directory before copying all the files to the USB drive from splitted directory.

When finished, your USB drive can be bootable to BIOS and UEFI computers.

June 11, 2020, Hong Kong, China

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