With incredible speed, the officially licensed SanDisk microSDXC card for the Nintendo Switch lets you add up to [64/128/256GB] of space to your system. Spend less time waiting and more time gaming with read and write speeds of up to 100MB/s and 90MB/s respectively. Perfect for keeping your favorite games in one place. Backed by a lifetime limited warranty, so you’re ready for the long haul.  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. Incredible speeds in a microSD card officially licensed for the Nintendo Switch systemSpend less time waiting and more time playing with read speeds up to 100MB/s and write speeds up to 60MB/sInstantly add up to 64GB (1GB=1,000,000,000 bytes. Actual user storage less.)Store your downloaded games, screenshots and video captures in one place so you can travel light