Dear dreamers
Here are settings to boot LibreELEC from usb, and Android9 from sd card.
Note: 1st install LibreELEC for multiboot GPT on good quality usb preferably USB3. Me using Kingston USB.
Then backup your both files and copy paste bootconfig.txt in data folder and uEnv.ini in usb main folder.
Here's Demo video from Android to LibreELEC and then flash image by just rebooting the Dreambox.
