The Crucial X6 is a compact portable SSD that uses Type-C connectivity and is an ideal solution for professionals or consumers who need access to their digital content on the go.  Available in capacities 1TB and 2TB capacities, Crucial quotes the X6 with read speeds up to 540MB/s via the USB 3.1 Gen-2 interface. This is just the second portable SSD release by Micron, the first being the Crucial X8, the company's more premium and expensive model.