The Thunderbolt™ 3 Expansion Card enables high-speed data transfer to accelerate everyday tasks and applications. Video editing studios in particular can greatly benefit by being able to smoothly transfer, display and edit 4K videos in real-time. Thunderbolt™ 4 devices can also be used by a NAS with a Thunderbolt™ 3 Expansion Cards when connected using standard Thunderbolt™ 4 certificated cables or passive Thunderbolt™ 3 cables shorter than 0.8 meters. Streamlined Video Editing Collaboration By using Thunderbolt™ 3 expansion cards, teamwork between Final Cut Pro® and Adobe Premiere Pro® users becomes faster and easier. With SMB protocol support, Final Cut Pro® users can create a library on a NAS volume and use it as if it were a local storage device. Every team member can centrally store video resources in the same NAS shared folder, greatly improving productivity for highly-collaborative projects in multi-workstation environments. Thunderbolt™ 3 Expansion Card Usage Scenarios Daisy-chain up to 6 QNAP Thunderbolt™ devices A NAS with a Thunderbolt™ 3 expansion card can be daisy-chained with up to 6 QNAP Thunderbolt™ devices, including other QNAP Thunderbolt™ NAS and Thunderbolt 3 to 10GbE Adapter (QNA Series). Connect legacy devices When used with an Apple Thunderbolt™ 3 (USB-C) to Thunderbolt™ 2 adapter* (sold by Apple), legacy Thunderbolt™ 2 MacBook can be connected to your Thunderbolt™ 3 NAS for sharing files and accessing centralized data.