Sandisk mobilemate duo card reader adaptor sandisk sddrk 121 b35 p the sandisk mobilemate duo card reader and adaptor lets you easily move files between your pc and any microsd enabled device a compact accessory for smartphones and tablets this versatile reader comes with an sd card adaptor that lets you use your microsd card with sd host devices p sandisk sddrk 121 b35 mobilemate duo card reader adaptor