Speed and efficiency issues (3 SSD's)

Hi there adobe users!

I just purchased some Samsung 860 EVO SSD's (2x 250GB, 1x 500GB) I have put all my footage and moved all the cache and temp files to their corresponding ssd's, I have a drone video I am working on (all footage is in 4k 30p, or 2.7k 60p slowed down to 50%) some footage plays back really nicely with colour grades and effects all the while WITHOUT being rendered but at the start I have some footage that lags to the point it crashes premiere... I have my project file and everything moved to the ssd's so what is going on? Also for whatever reason rendering is a joke, taking well over an hour for 7000 frames.

I'm not sure if I went into this wrong, expecting it to flow like butter or whether I just need to lower my expectations but I heard using 3 ssd's and assigning them to a seperate task in premiere will increase performance heaps over a hard drive, but it seems that im getting worse performance out of these drives. Would someone please be able to assist me in what i may have missed or if there is something i've done wrong? THANK YOU SOOO MUCH

P.S. I will gladly provide sample footage/photos of the issues if you need a better understanding of what I'm talking about, thanks!!!