BestRunner(TM) Micro USB / USB 2.0 Flash Drive Memory Stick Pen 2 in 1 for OTG Phone PC Tablet 1G 2G 4G 8G 16G 32GB 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 Operating System: Windows 2000 / XP and above Interface: USB interface, no drive, plug and play, hot-swappable