Its a portable external SSD that can replace your typical hard drive. It weights 56g and is a size of a playing card ( 92 x 62 x 10.5mm). It come with a USB 3.0 cable and a carrying pouch. The published read speed is 410MB/s while the write speed is 380MB/s. Storage capacity starts from 128GB right up to 1 TB. Just a side note it’s an upgrade of the older ESD200.