Connect first- and second-generation Thunderbolt devices to your Thunderbolt 3-enabled device using the Thunderbolt 3 to Thunderbolt Adapter from StarTech. It is backward-compatible, allowing you to connect to first-generation Thunderbolt devices at 10Gbps speed, and Thunderbolt 2 devices at 20Gbps speed. The adapter supports bidirectional data transfers and simultaneous power delivery for bus-powered devices.
You can set up 10Gbps peer-to-peer networking between older Thunderbolt laptops and newer Thunderbolt laptops to share peripherals such as printers and storage, or for quickly migrating data to a new computer.
