You have to first root your phone then you can play around with it any way you want.
Uou can even swap your sd card and internal memory or you can convert just transfer the apps to your sd cars via gl2sd app, but only after rooting.
http://galaxygrandce...ty-and.html?m=1
Use this guide to root your phone,I have rooted my phone succesfully via this guide, you can also view the video in the guide just to make things clear but follow the steps according to the guide, tere might be some problem regardin the Clock Work Mode initially but that all can be sorted out, as was the case with me, anyways just follow the guide, in case of any problem I will try my best to help.
Also go through this forum
http://forum.xda-dev...d.php?t=2160671
You will be well aware of what you are doing and will also see problems faced by others and how they get solved.