Item specifics: 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 Capacity: 16G Net Weight: 2g :Red,Black,White(please leave a massage to let us know which you like or we will send at randaom!!) Size: Approx. 2.8x1.5x0.5cm Writing Speed: 6M/S Reading Speed: 15M/S Operating System: Windows 7 / 8,Windows Vista,Windows 2000, OS X, Linux. and above Interface: USB interface, no drive, plug and play, hot-swappable Features: More than 10 years data retention USB 2.0 Hot Plug Play Compatible Fashionable and convenient to carry Earthquake proof, Anti-electromagnetic wave Applicable models: the various brand PC and compatible computers, Macintosh, PowerBook, tablet PC with OTG function,iMAC or iBook. Note: smart phones with OTG function How to use Mobile phone connection After the micro USB port is inserted to the mobile terminal ,the USB drive icon will appear in your phone, which means it has been connected successfully. Open the phone file management,and find the USB storage folder. enter the USB storage, then you can directly browse pictures, documents video,etc. Press the selected file for 2 seconds until the selection box pops up,then you can copy, delete the files and so on. ?Computer connection Please insert the usb port to your computer The method of operation is the same as the ordinary U disk a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a