Hi guys. I installed the M4 this June and it was working flawlessly. Until September, I had the write speed of 190mbps and 500mbps read. As October came, my Diskspeedtest indicated my SSD getting slower and slower. On the initial start up and test of the Blackmagic app, I get 190/500. But as the second test goes, it gets slower and slower. Around the 5th time, both comes to under 50mbps. Is this a problem with my MBP, SSD, or the Blackmagic App? I tried setting target disk mode to both my User folder and desktop but no change. And yes I am not selecting my Optibay drive. Here is the lowest score I got on my SSD.