Powering two disks from RockPro64

[some_pinephone_user]

Hello all. I'm thinking about following option:

connect one 2.5" HDD to a USB3.0 port and second HDD to a USB-C port. Can be both powered on simultaneoulsy only from USB?
If I transfer data from one disk to another will the data transfer be too slow because both disk are on the same USB3 controller?

What if I connect the second disk to a USB2 port?

Only one disk will be working 24/7. The other one will only be turned on for weekly backups.

[evilbunny]

The USB ports don't have enough power for that unless the drives are externally powered

[some_pinephone_user]

The USB ports don't have enough power for that unless the drives are externally powered

That is what I suspected, thank you. Right now one drive hangs on USB3 port without external power, but I suspect that the whole power delivery is divided between all USB ports, and that is why two drives are impossible without external power right?