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VIM4 has an onboard eMMC, so you can install the OS into the eMMC.
You can also choose to install the OS into eMMC via the USB Upgrade Tool1) on a Windows PC.
Please check install-os-into-emmc-on-windows.
You can also choose to install the OS into eMMC via the USB Upgrade Tool on a Ubuntu PC.
Please check install-os-into-emmc-on-ubuntu.
VIM4 also supports to boot from external storage, e.g. TF card
, USB storage
, etc.
Please check VIM4 Install OS into External Storage.