This 128GB G Series XQD Format Version 2 Memory Card from Sony is a XQD memory card designed to enhance the workflow of those working with 4K video content and RAW images. With data read speeds of up to 400 MB/s and write speeds of up to 350 MB/s you can transfer your various media files quickly and efficiently. Sony has integrated their own unique controller to ensure the data speeds are accurate and consistent. Additionally, this memory card comes with a USB 3.0 adapter to help streamline workflows when a XQD card slot isn't available.