There are three options:
1 - Grab one of those pico itx power supplies (>150W) and use it to power both the board and the drives (should check 5V rail power) . You'll need a 12V 12A PSU brick too.
2 - Get a 12V 12A supply and a 12V to 5V 2A step down converter, should be enough to power the 4 drives and the rockpro64.
3 - Get a flex atx psu
I am considering 30W per drive at real maximum load, and that is unlikely to happen. I am being conservative there. Moreover, it's better for the PSU to not work at full power.
1 - Grab one of those pico itx power supplies (>150W) and use it to power both the board and the drives (should check 5V rail power) . You'll need a 12V 12A PSU brick too.
2 - Get a 12V 12A supply and a 12V to 5V 2A step down converter, should be enough to power the 4 drives and the rockpro64.
3 - Get a flex atx psu
I am considering 30W per drive at real maximum load, and that is unlikely to happen. I am being conservative there. Moreover, it's better for the PSU to not work at full power.
