Right now I have a WD Blue 1TB (wdezex I think) and I use it to store videos and games. I'm thinking I want to replace it with a 4tb drive since I'm running out of space on it. I've looked at a few WD and Seagate ones on Amazon, but I'm not sure which ones are the best for under $100. I've also heard of them sneaking SMR instead of CMR, which is apparently worse somehow? How would a 5400 rpm CMR drive compare to a 7200 rpm SMR drive?