The graphite gray 4TB SSD2GO PKT XT USB 3.1 Type-C External SSD from Angelbird is a small portable solid-state drive for users on-the-go. You can access and transfer files quickly with read speeds of up to 1 GB/s and write speeds of up to 900 MB/s. In addition, it will work with Windows, Mac, Linux, and Android and connects to your system via a USB 3.1 Type-C interface that supports data transfer rates of up to 10 Gb/s. The SSD is backwards compatible with Thunderbolt 3, USB 3.1 Gen 1, USB 3, and USB 2 connections.