'storage space running out'

What is the solution for Internal storage problem on GT-I9190. Please help cuz this problem really affecting me grately.
 
Hi This doesn't work for me, nothing happened when I put the number. Is there another way to get rid of the message and get free space on my phone. It's a samsung galaxy 2 GTi9100. I am so desperate right now. A little help will be appreciated. Thanks
 
How do you dial anything on a tablet? On what screen or application do I input the *#9900# ? Help I am at my wits end with the storage space running out issue.
 
This is what works for me on a Tab2 7, wi-fi model.
Go to settings/storage.
scroll down to 'cached data', select it and then select 'clear cache'.
Observe the colour bands depicting memory allocation.
Select Apps, delete any unwanted apps but be careful to not delete the basic set, if this folder doesn't take up much room, just leave it.
Scroll further down to see if there's a folder called 'misc' or similar, enter it. Mine was over 2g so I selected 2 huge folders in there and deleted them leaving some very small [8kb] folders alone for now.
The bar at the top shows how much you have recovered, I gained 3.5gb.
I rebooted just to be sure, all seems well. YMMV as they say.
Cheers,
Mac