owc express 4m2 4-slot m.2 nvme ssd enclosure w/ thunderbolt3 ports owc the owc express 4m2 is designed with superior ease-of-use in mind. we worked with award-winning creatives and listened to the kudos they heaped onto the owc thunderbay mini, and we put all that shared knowledge to good use when we set out to build the next-gen thunderbolt 3 multi-bay drive. the result is the 57% smaller and 2.5x faster owc express 4m2. it's smaller and easier to fit into your workflow, studio and on stage. it's faster with four easy-access m.2 slots so you can swap, upgrade or expand your express 4m2 to configure and reconfigure it to serve any project need. nvme (non-volatile memory express) is a hyper-efficient communications interface protocol built from the ground up to properly take advantage of ssd technology and high-performance connection buses like pcie. the result is exponentially faster and efficient ssd storage, and the owc express 4m2 has room for four nvme ssds. display connection flexibility is yours with a convenient displayport located right on the rear of the owc express 4m2. there's no need to worry about adapters or extra long cables. just plug your display directly into the express 4m2 and you're all set. the owc express 4m2 comes equipped with owc softraid which provides the amazing capability to raid across multiple drive enclosures. you can also add more express 4m2 drives to your storage pool using windows storage spaces. configure and reconfigure your storage however you need by combining multiple owc express 4m2 drives together on mac and windows. the owc express 4m2 is fully backward compatible with thunderbolt and thunderbolt 2. utilize thunderbolt 3 performance to work at full speed, and step back to thunderbolt or thunderbolt 2 whenever connectivity compatibility is needed for your workflow. add a thunderbolt 3 (usb-c) to thunderbolt 2 adapter along with the appropriate thunderbolt cable, and you're all set. owc express 4m2 comes with an owc thunderbolt 3 cable which is thunderbolt certified for mac and windows.