Recently got a deal on a 2012 MacBook Air with the upgraded HD to 256 GB. However, I am wondering if it is worth it to sell this and buy an air with the 8 GB ram upgrade opposed to the 256 GB. I am a student and use this computer for daily tasks, browsing, word, PowerPoint, movies, ect. I am also looking to use this for the long run. Is 8 GB necessary for me?