1. Plug and Play. When connect the U-disk to Smartphone Then you can transfer Dates Play music and video File Exchange. No need install any software. 2. Work with Samsung Galaxy Note Galaxy Nexus Galaxy SI/II/III Motorola XOOM TG01 Nokia N8E7. And other Cell Phones and Table which support OTG Function. 3. Also work as normal Flash Disk User can use this device when connect to PC and Notebook. How to use Smartphone U-Disk? (1) Connect U-Disk to Mac/PC through USB save files to Smartphone U-Disk. Then remove connection. (2) Connect Smartphone U-Disk to Cell Phone which support OTG funtion then entering "USB storage". Multiple Operation Systems supported: Android Mac OS Windows &Linux