Support M.2 SSD expansion: Mac Mini Dock supports SSD expansion, you can use this USB Hub to expand the external solid-state hard drive to meet the insufficient storage needs of Mac Mini. The USB-C HUB supports M.2 PCIe NVMe SSD 16Gbps interface, compatible with M.2 NVMe SSD or M.2 SATA SSD 6Gbps, 2242/2260/2280 size M.2 SSD.Note: SSD is not included. Please kindly make sure the SSD hard drive is inserted correctly and erase SSD when use with new one. 5 in 1 Mac Mini USB C HUB: This Mac Mini Mount includes 2 USB C ports with transmission speed up to 10Gbps, SD/TF card reader supporting simultaneous read and write and 1 M.2 NVMe SSD expansion port, expanding your The MAC Mini memory to achieve multi-functional expansion at the same time. This USB C hub for Mac Mini supports disks up to 4TB (m.2 NVME or m.2 NVME SATA ), and features 2 USB C transfer data ports to support disks up to 2TB.