1. You must have a micro SD card installed.
2. Connect your USB cable to your computer.
3. Make sure your phone is powered on.
4. Open the USB cover on the right side of the phone and connect the small usb port to the phone. NOTE: if your computer tries to find software for the phone, continue and allow it to locate the drivers.
5. Make sure the phone is set to "Mass storage". Change this by going to Settings>Phone settings>PC connection> press OK after highlighting "USB Mass Storage"