- Petitboot (v20201218 and later) - click
- Hardkernel stock Android selfinstall image (v20201221) - click
This is a bit hard compare to other Android system since ODROID-HC4 does not have USB OTG port and the target storage what we are trying to install is a generic storage. Therefore, you need to use different method unlike other ODROID SBC.
- Method #1 - Use USB-to-SATA adapter to flash the selfinstall image to your SSD/HDD from a desktop/laptop
- Method #2 - Flash the selfinstall image on ODROID-HC4 using ODROID Etcher that can run on Hardkernel stock Ubuntu Mate 20.04
Pros & Cons using Android over SDD/HDD
The large capacity in low cost relatively to eMMC/SD, but the tradeoff is the I/O performance. It would be a good approach to run Android on high capacity storage if you are planning to run Android as a file server or playing an game emulator with tons rom files. Multiple OS installation in a storage is also feasible.
This is an experimental feature what we are thinking of good to be supported with ODROID. Due to the limited effort in short development term, this features would not be stable enough to satisfy you or could be discontinued.
We are welcome your inputs.