Create a bootable Windows 10 USB drive (handles images >4GB):
Download Windows install ISO and insert USB drive. Open Administrator command window. Run diskpart:
Microsoft DiskPart version 10.0.19041.610
Copyright (C) Microsoft Corporation.
On computer: ABYSS
DISKPART> list disk
Disk ### Status Size Free Dyn Gpt
-------- ------------- ------- ------- --- ---
Disk 0 Online 1863 GB 1024 KB *
Disk 1 Online 14 GB 13 GB
DISKPART> select disk 1
Disk 1 is now the selected disk.
DISKPART> clean
DiskPart succeeded in cleaning the disk.
DISKPART> conv mbr
DiskPart successfully converted the selected disk to MBR format.
DISKPART> create partition primary offset=32 size=1000
DiskPart succeeded in creating the specified partition.
DISKPART> format fs=fat32 quick label=WIN10
100 percent completed
DiskPart successfully formatted the volume.
DISKPART> assign letter=X
DiskPart successfully assigned the drive letter or mount point.
DISKPART> active
DiskPart marked the current partition as active.
DISKPART> create partition primary
DiskPart succeeded in creating the specified partition.
DISKPART> format fs=exfat quick label=WIN10EX
100 percent completed
DiskPart successfully formatted the volume.
DISKPART> assign letter=Y
DiskPart successfully assigned the drive letter or mount point.
DISKPART> exit
Leaving DiskPart...
Update the boot code:
> bootsect /NT60 X: /MBR
Target volumes will be updated with BOOTMGR compatible bootcode.
X: (\\?\Volume{3ab47fec-36fc-11eb-b202-9848272e2061})
Successfully updated FAT32 filesystem bootcode.
\??\PhysicalDrive1
Successfully updated disk bootcode.
Bootcode was successfully updated on all targeted volumes.
Now mount the install ISO.
- Copy all ISO contents to the the EXFAT partition (Y:).
- Copy all ISO contents except
sourcesto the FAT32 partition (X:). - Create
X:\sourcesand copyboot.wimfrom the ISO into it.
Eject the ISO and USB volumes.