Hello I just got a Samsung 860 evo ssd for Christmas. I am not the best with pcs. I have installed done the migrating software and everything is over. When I unplug my old hard disk drive it boots up on windows on my ssd and does it really quick. However, when I plug the hdd back in then go to bios it says my hdd is the windows boot manager and everyone starts to go slow again. I can get the speed I just can’t use my 2tb hard drive for some reason. Could someone please help me with this as I need that hdd for storage but I don’t wnat it to be slow thanks.