The JEYI 40Gbps USB 4.0 M.2 NVMe SSD Enclosure is a high-performance external storage adapter powered by the ASM2464 controller chip. Key Specifications • Transfer Speed: Up to 40Gbps via USB4 / Thunderbolt 3/4. • Performance: Theoretical maximum read speeds up to 3200 MB/s and write speeds up to 2700 MB/s. • Compatibility: Backwards compatible with USB 3.2 Gen 2x2 (20Gbps), USB 3.2 Gen 2 (10Gbps), and USB 3.2 Gen 1 (5Gbps). Supports PCIe and USB Dual Tunnels. • SSD Support: Exclusively designed for M-Key and B+M-Key NVMe SSDs in the 2280 form factor (does not support SATA SSDs). • Maximum Capacity: Supports up to 8TB single-drive capacity. • Cooling & Build: Solid CNC-machined aluminum alloy chassis equipped with thermal pads for sustained heavy workloads.