Fortysomething Geek: Reviewed: Kanex Thunderbolt to eSATA + USB 3.0 Adapter . A cheap Thunderbolt USB 3.0 alternative.
Thunderbolt to eSATA + USB 3.0 Adapter KTU10 Hard Drive Converter, Thunderbolt to USB 3.0 Port + eSATA TBT10Gbp PCIE2.0 Adapter Cable for Note Book Pro Laptop, PC