I talked to a guy at OWC last night. He said I could use a Thunderbolt (1 or 2) to USB 3 adapter on a Mercury on the Go portable drive. But I found only one by Kantek with mixed reviews at best. That kind of connection never caught on. I'm not sure it works.

OWC has some big price drops on Thunderbolt drives: Buffalo, LaCie, G-technology 1TB from $137 to $179. I've read negative reviews about them and have never used those brands. Could be a back to school sale or it could be they're no good. Or I could get another Mercury Firewire drive for about the same price. Or I could put a bare drive in Thunderbolt enclosure.

According to Aja System Test Lite, I'm getting 172 MB/s on my current OWC Firewire drive. Seems a lot slower than that.