With incredible speed, the officially licensed SanDisk microSDXC card for the Nintendo Switch lets you add up to [64/128/256GB] of space for your system. Spend less time waiting and more time gaming with read and write speeds of up to 100MB/s (1) and 90MB/s (1) respectively. Perfect for keeping your favorite games in one place. Backed by a lifetime limited warranty, (2) so you’re ready for the long haul. | 1GB=1,000,000,000 bytes. Actual user storage less. | (1)128-256GB: Up to 100MB/s read speed; up to 90MB/s write speed. 64GB: Up to 100MB/s read speed; up to 60MB/s write speed. Based on internal testing; performance may be lower depending upon host device interface, usage conditions and other factors. 1MB = 1,000,000 bytes. | (2) 30 year warranty in Germany, Canada, and regions not recognizing lifetime warranty.