Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter
Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - iClarified
The Apple Thunderbolt 3 to Thunderbolt 2 Adapter- Connect your TB3 Accessory to a TB 2 Mac Mini - YouTube
Can I Use a Thunderbolt 3 Device With a Thunderbolt 2 Mac?
Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - Apple
Amazon.com: StarTech.com Thunderbolt 3 to Thunderbolt 2 Adapter (Non-Reversible) - TB3 Laptop to TB2 (20Gbps) or TB1 (10Gbps) Devices / Displays - Black - Windows/Mac (TBT3TBTADAP) : Electronics
Amazon.com: Onep USB C to Mini DisplayPort, Onepeace Thunderbolt 3 Cable to USB C 6.6FT, Compatible for MacBook ProAir 2020-2016, Surface Book2, Galaxy S2191020 (NOT Thunderbolt 2) : Electronics
DataPro's Thunderbolt Guide and FAQ
Kanex Thunderbolt to eSATA + USB 3.0 Adapter
How to Use and Set Up Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter - YouTube