How do I move pictures from gallery to SD card on my Samsung Galaxy S3?

With a username like "hecticmomof6" I figured a giant Thank You was in order for giving the excellent instructions that you did! Worked like a charm.
 
Thank you so much for the detailed answer that worked perfectly. Wish all the answers were this good! And I thank the OP because I had the same question. And sometimes I don't feel like going through a long tutorial just to find one answer.
 
Thank you sooooo much!!!:D This is a fool proof (I should know) solution which I would never have worked out for myself, I'm so pleased.
 
THANK U !!!!!!! Your instructions are PERFECT !!! I am preparing to upgrade FINALLY and am trying to make sure I dont lose anything.
 
Please help me how to move my mobile is samsung grand duos i dont know how to do it.thanks
 
Thank you for your precise help hecticmomof6, I've just moved all my daughter's pics from her phone to her 32gb sd card :)
 
Help! I have clear all the data in my app manager including the gallery, I didn't know all the files there will be deleted. But, the pictures and files where there in the my files (device storage) How do I open it using the gallery. Because when I open the gallery there is no items seen? my phone is Samsung Grand Prime