Connect the enclosed Micro USB to USB cable to your smartphone and computer. Once connected successfully, on your phone, slide the top menu down and click on “USB connected”, then, press “Turn on USB storage” button. A new storage named “Nitro 55M” will appear on your “My Computer”. Click in it to review files in the smartphone and /or to transfer documents between devices. When finished, press” Turn off USB storage” button on phone to disconnect.