SanDisk announced the fastest high capacity USB Flash Drive in the world, after Kingston ultra high capacity Device now San Disk 256GB* San Disk Extreme Pro Usb 3.1 Solid State Flash Drive, This fast 256GB USB Drive better from other Lettle USB Drives when we will compare 4GB, 8GB or any other size a a result SanDisk speed more better. SanDisk’s Extreme PRO USB 3.1 Solid