3 ms·USB-B for USB 3 is physically quite different, yes — looks like two stacked connectors.by pdpi 7y agoUSB-B for USB 3 is physically quite different, yes — looks like two stacked connectors.sargun 7y agoIt’s a micro usb plus another kind of adapter. This gives you backwards compatibility for devices if you want to expose usb 2 via usb-a -> micropdpi 7y agoI was actually thinking about B rather than micro-B, though I guess both my description and your explanation apply either way!