VIM4 has onboard eMMC, allowing you to install the OS directly.
VIM4 includes the OOWOW service, an embedded tool for installing the OS directly from the cloud. This is the easiest way to install the OS.
Refer to VIM4 Install OS into eMMC via OOWOW for instructions.
Refer to VIM4 Install OS into eMMC via USB Flash Tool for instructions.
VIM4 supports booting from external storage, such as a TF card or USB storage.
See VIM4 Install OS into External Storage for details.