Do you want to move photos from the gallery to the EX SD card ? If so you can easily do so using a file manager like ES File Manager, download from the play store and install. Open file manager and navigate to the pics you want to move, select them then choose ex SD as the destination folder.
there is an app called astro file manager that i use,ok heres what u do:
1.download and install astro file manager from play store(dont worry,they have a free version)
2.open astro file manager,and click sd card zero,then u should see a folder called DCIM,click on it,an then theres a folder within it called camera,click on that,that should be where your photos are stored
2.press and hold the file you want to move,then an option to move the file should appear,click on that.