Arctis 5

I have Arctis 5 headphones and I noticed that while playing games or watching videos in general there is no sound that travels between the right and left ear. What I mean is that everything that I hear appears to be in the middle. This is a problem as hearing footsteps above/left/right etc. is...

So i cant decide between these two headsets. Both are at the same price where i live, which is about 90 dollars. Any tips, advice and experience using either.

I’ve been told you can only run steam and battle net on a 3.5 external hard drive, but I currently can’t afford that so is it possible to run them on a 2.5?