Hi, Tommy21:
It’s quite common approach to upgrade ROM on VIM:
For Windows PC
- Upgrade Via an USB Cable on Windows PC
- Upgrade Via a Burnning TF Card on Windows PC
- Upgrade LibreELEC SD Card ROM on Windows PC
For Linux PC
###Further readings:
*Ubuntu ROM upgrade instruction on SD card
*Ubuntu ROM upgrade instruction on eMMC, this can be done on WIndows PC
Read Khadas Docs for more infos.
Enjoy