The Professional Workflow HR2 4-Bay Thunderbolt 2/USB 3.0 Hub from Lexar is a 4-bay hub that supports Lexar's Professional Workflow line of USB 3.0 storage drives and Thunderbolt 2/USB 3.0 card readers. You can connect this hub using either Thunderbolt 2 or USB 3.0. You can also add up to four flash-based storage drives to this hub and store transferred files. Even if you connect it to the computer with Thunderbolt 2, the drives and readers will still operate at USB 3.0 speed. However, because Thunderbolt 2 supports a faster overall speed, you can use all four devices in the bay at the same time, without slowing down. The hub is also backwards compatible with Thunderbolt and USB 2.0 (at slower speeds), while using the same cables and connectors.