I have a Inateck 2 bay USB Type C External Hard Drive RAID Enclosure with one Samsung 500GB SSD and a Samsung 1 TB SSD. I am changing the 500GB for a second 1TB. Presently the unit is bus powered and I have no issues. There is a port for AC power which I never needed. How will I know if I need to supply external power to the drives. What are the signs that the unit is having problems with using USB power?