I have 3 Verbatim external HDD 2 TB each. I couldn't connect them to a medai player with an USB HUB (Digitus High speed 4-port USB hub). Also notebook doesn't see the HDDs. What can be the problem ? Hub has its own power adapter.
More aboutexternal each
do the drives sound like they're operating? i.e. are there any lights on the drives, do you hear any spinning movement? does the power adapter for those drives display any warmth?