Hello, about 6 mouths ago i built my PC and my hard drive is a Samsung 850 EVO 240GB. I have now run out of space so i bought another one. i just installed it and WEI ( windows experience index) gave my hard drive score of 5.9. Before i installed this second drive I had a 7.9. This confuses me because they are the exact same drive. This is really bothering me so if anyone knows how to fix this that would be awesome. Thanks