About transferring and synchronizing media files
You can connect your BlackBerry® device to your computer to transfer and synchronize files between your device and computer using a USB cable, or you can use Bluetooth® technology to send media files to or receive media files from a Bluetooth enabled device.
The USB option in the dialog box that appears when you connect your device to your computer with a USB cable allows you to drag most files from a folder on your computer to a folder on your device or media card. The media option in the dialog box allows you to transfer media files that are protected with DRM to and from your device. Both options allow you to use the BlackBerry® Desktop Software to transfer files to and from your device.
If you want to manage and preserve the information or the encryption that is associated with your media files when you transfer files between your device and your computer, use the media option in the BlackBerry Desktop Software. To download the BlackBerry Desktop Software, from your computer, visit www.blackberry.com/desktop and select the appropriate option for your computer.