I am about to purchase a new macbook pro for college. Over the last three years I have used 96 gb/250gb of hard drive space on my macbook. Do you suggest that I get the 256 gb ssd or the 128 gb ssd? I am going to be a business major. I'm not sure if I should go for 256 to be safe, or if the 128 will do. I plan on using this computer for the next four years and do not want to run out of hard drive space, but at the same time am a bit hesitant about dropping the extra cash for the 256 gb. Thanks.