USB 3 via ExpressCard/34 on a thunderbolt with parallels desktop Can I use an extenal  windows formatted USB3 harddisk on my mac connected via thunderbolt on the future Sonnet Echo-Expresscard/34-Thunderbolt-Adapter? It's clear I can use UBS3 HDs for Mac, but how is it when virtually running windows?
If the drive works on the Mac side, it will work under Windows within the virtual environment.  The hardware is virtualized, so Windows will not see it as a USB3 device.