From Sony Support

How to transfer video or images from a camcorder with a hard disk drive using a USB connection.

IMPORTANT: Movie player applications must support mpeg 2 playback to open these files properly. Refer to the software manufacturer for additional information and available updates. Turn on the computer. [ul][*]Make sure the camcorder is turned off.[*]Connect the camcorder to the computer using the supplied USB cable.[*]Plug the AC power adapter into an electrical wall outlet and then connect it to the camcorder.[*]Open the LCD screen on the camcorder.[*]Turn on the camcorder.[*]The USB SELECT screen will be displayed on the LCD; touch the HDD icon.[*]Open the My Computer window on the computer.[*]In the My Computer window, double-click the icon that represents the camcorder and then navigate through the folder structure to locate the video you want to transfer. NOTE: The camcorder will be listed in the My Computer window as an additional hard drive.[*]Click to select the video or image files you want to transfer.NOTE: If your are using a High Definition Handycam® Camcorder, Sony recommends copying and pasting the AVCHD folder to the hard drive of the computer before accessing its contents.[*]Type CTRL+C to copy the files.[*]Click on the computer folder to which you want to copy the video or still image files.[*]Type CTRL+V to paste the file into the computer folder.[/ul]