Adds ultra-fast SSDs to your system - Offers four M.2 NVME SSDs (sold separately) in your computer's x16 PCIe slot or Thunderbolt expansion chassis High performance PCIe interface - PCI Express 3.0 x16 host bus interface for high performance applications Outstanding performance - simultaneous data transfer speeds up to 12,000 MB / s (3) Great way to add up to 8TB of M.2 SSD storage to computers with Thunderbolt - Perfect for use in Sonnets Echo Express III-D, Echo Express III-R, xMac Mini Server, xMac Pro Server and Thunderbolt expansion systems RAID support - Supports MacOS and Windows RA