With this adapter, you can connect newer Thunderbolt 3 computers or laptops to legacy Thunderbolt devices, such as external hard drives, displays, and older Thunderbolt capable Mac computers. Thunder more→bolt 3 Logo Because this adapter is backward compatible, you can connect to first-generation Thunderbolt devices at 10Gbps speed. With Thunderbolt 2 devices, you can connect at 20Gbps. The adapter supports bi-directional data transfers and simultaneous power delivery for bus-powered devices. You can also set up 10Gbps peer-to-peer networking between older Thunderbolt laptops and newer Thunderbolt laptops. This is perfect for setting up small workgroups and sharing peripherals such as printers …