Hi, I have a lenovo flex 14 laptop with 1.7 Ghz i3 4010U and 4 GB ram. I use it mostly for web surfing, watching videos and some light document editing. Recently, folders and programs are taking a lot of time to open and the lag is even more apparent while browsing. Currently, there is one pinned tab and 2 open tabs in my chrome and the RAM is at 70% and for more than 3 tabs open the tab automatically starts reloading when cycling between them. So, would upgrading only RAM be enough or should I get an SSD too. One more thing, I want to spend as little as possible since I use this laptop mainly for surfing which I admit can get a little bit heavy and one or two other normal programs, nothing intensive or demanding and so spending on SSD when I don't need one would be a waste. What do you think? Please explain in detail especially SSD part and its effects.