Just got my new phone and feeling my way around. First I wanted to load some pictures from my computer. The only way I could make that work was to remove the Micro SD card, stick it in the computer, and load the pictures, and insert SD card back into phone. Worked fine; just awkward. When I connect the phone to the computer via USB cable, computer asks me to insert driver disk, which I don't have. What is the purpose of a USB cable?