BESTRUNNER 2 in 1 OTG Micro Pen Drive Memory Stick Storage Thumb for Phone PC Tablet 32GB 16GB 8GB 4GB 2GB NOTICE: Only 1pcs, please kindly choose the color and capacity you want, thanks Capacity: 8GB Function 1: Ordinary U disk Function 2: Micro SD card reader without taking the TF card out of mobile phone Function 3: Smartphone external storage device