use sd card on galaxy tab 4 default storage

[MT2015]

I have SD card installed in my Galaxy Tab 4, Samsung but have been unable to access it for storage.
I want to move photos there but most of all I want to load updates on some games (Just 2 words, scrabble) but I have been unable to find the settings to do this
Have done a wide search on line & either have to purchase more software or some of the steps suggested are not available on my unit.
please advise with thanks
MT

 

[MT2015]

PS I watched the video but at 52 seconds mydisplay looks much different so I do not know where to go from here...MT