Hi…I’ve got an older USB3-HUB7-81X and I have it connected to a 2019 Macbook Pro USB C port using a Syntech USB C to USB Adapter. When I run Apple’s System Information tool, it shows all my USB 3 devices (external HDs) are USB 2 devices running at 480 mbs. Is this expected?
Yes it should connect at 3.0 speeds. Are you sure that the devices are connecting at 2.0 speeds? macOS should show 1.1/2.0 devices under a 2.0 tree and USB 3.0 devices under a 3.0 tree. It varies slightly depending what macOS version you have of course.
Here is my system with a hub attached. The hub itself shows up four times (twice for 2.0, twice for 3.0). Currently I have no 3.0 devices attached so everything shows up as 2.0: