Should your SD Card be plugged in properly you should be able to preform one of two options.
Device Care > Storage > Images (Select all)> Move to SD Card.
Reason you go this route is you can move your videos from there too. You cannot run apps on the SD card at the moment as far as I know.
You can also go from Gallery > select all > move to (or copy to) sd card.
I don't have mine installed so I don't know if that's the correct order.
lshank22, we know it's important to be able to transfer your pictures to your SD card, and we would be glad to shed some light on your concerns. Please tell us, what is the make and model of your device? Are you interested in using a cloud service or computer to transferyour pictures?