If you want to free space by just moving photos and music, videos, etc. to the card, that is pretty simple. However if you are wanting to move and run apps from the card, that I believe won't work on that device. If memory serves. However, below are the instructions on how to do so, should it possibly work on your device.
First, you need to be using a phone that is running at least Android "Marshmallow" or be able to upgrade to it. Second, you will need the instructions I am including below. And third, you need a phone that has not been restricted by the manufacturer from making this change. Which does happen.
NOTE: If any of the steps are missing on your phone, or they don't work for you, then you have a phone that either has an...