This is a proprietary 2.5" 256GB Server-Grade SSD from Convergent Design, made specifically for the Odyssey 7, 7Q, and 7Q+ monitors/recorders. It's designed to maintain the read/write speeds required by the Odyssey throughout its lifespan. It also features a power protection circuit that in the event of a power loss will close out the current file to prevent corruption of the file and remaining data.