Ah, I should've of replied sooner when I found out the problem. But I had to be sure that its not there.
From all the mucking about I was doing, I think it was cause the cache was set on 32k and not 64k when you make a RAID. But aneway what ever I did I fixed it.
What I did was, I reinstall OS under Legacy (also made sure the cache on the Raid configuration is set properly) and apparently it was still going choppy when I was opening like media player and bout to play a song in another hard drive or such, so I deleted the configuration on Raid, check my bios and make sure CSM is done up right. Put it UEFI mode Reinstall Windows and now its running as it suppose to be.
So I don't know what I did exactly to fix it but I guess it could be the cache got set 32k by default when it was meant to be 64k or something, something I missed that I was meant to put on in the bios.. But what ever it was, its not doing the loading delay anemore.
But I reckon I should get myself 4 TB hard drive, considering the hard drive space is like passed halfway point on my 2TB for my data storage.
Do you think Green Western Digital is ok for like things like "opening Video Files, Music that kind of stuff?"