Multifunctional 7-IN-1 USB Adapter designed for imac: Docking Station supports 1 USB C 3.2 Gen2 10Gbps, 1 USB A 3.2 10Gbps, 2 USB A 2.0 480Mbps, SD/TF card reader, and 1 M.2 NVMe. While expanding the function, expand a super-large (4TB) external hard disk for your imac, which greatly expands your imac storage. (External SSD needs to be purchased separately) imac accessories support M.2 SSD: usb c hub allows you to expand an external hard drive through this imac hub to expand the storage of iMac to meet the different needs of iMac storage, compatible with M.2 NVMe SSD or M.2 SATA SSD, the maximum Support 4TB memory, transfer speed up to 10Gbps, and easy to install, it is an essential accessory for imac. If your SSD is new, please format your NEW SSD into "exFat" or "apfs" format.