Windows Phone 8 currently has no app to move all of your music, photos and video from the internal storage to SD memory card - you must do this manually.Move the files to your PC.Connect your Windows Phone 8 device to your PC with a USB cable. Open Windows Explorer, your device should show up (eg. Nokia Lumia 820).When you browse the device you'll see Phone and SD card. Expand Phone and you'll see the Pictures, Videos, etc.Go into each folder and select all the sub-folders then move them to your PC (eg.
A temporary folder on your desktop).When that's done, double check that the Pictures, Videos and Music folders on the Phone are empty.Move the files onto the SD card.Browse the SD card and you'll see Music, Pictures and Videos.Copy the sub-folders from your desktop into the equivalent folders on the SD card.Tested on a Lumia 820 with 4GB SD card on Windows 8 Pro.
With Windows Phone 8.1, you can have a lot of available memory with the ability to move apps and games to the card, opening a lot of opportunity, especially for those with lower-end devices like.