• Format entire USB to FAT32
• Create Windows install USB for EFI boot ¹⁾

su -

geom disk list

gpart destroy -F 'da0'

gpart create -s 'MBR' 'da0'

gpart add -t 'fat32' 'da0'

gpart list 'da0'

newfs_msdos -F '32' -L 'Windows' '/dev/da0s1'

su -

mkdir -p '/mnt/USB1' && mount_msdosfs -o 'longnames' -u '1001' -g '1001' -l '/dev/da0s1' '/mnt/USB1'

exit

gio open '/mnt/USB1'

7z x ~/'Downloads/en-us_windows_10_iot_enterprise_ltsc_2021_x64_dvd_257ad90f.iso' -o'/mnt/USB1' && sync

• Windows 10 21H2 Cumulative Updates - Microsoft Update Catalog
• Programs

mkdir -p '/mnt/USB1/W10USB' && gio open ~/'Downloads' '/mnt/USB1/W10USB'