The largest was 400GB memory card made by SanDisk but has been overtaken by new Integral MicroSD card which packs a whooping 512GB of storage (half a terabyte) in a tiny chip.
It was reported that the memory card would run a processing speed up to 80MB/s but the 400GB Micro SD card runs up to 100MB/s. So, the 512GB is a bit slow.
It’s designed to capture full HD video off cameras because it meets the V10 standard for video transfer rates and is classified as SDXC UHS-I U1 card I.e it has minimum write speed of 10MB/s.
Nevertheless, the announce date hasn’t been revealed yet but is going to be launched and available in the open market around sometimes February.