Question Drives working fine separately, not working when together ?

[ttwCryptic]

I've been having an issue for a while where my two HDD's don't work when plugged in together, however both are perfectly fine by themselves. The older drive is a 2tb hybrid SSHD-HDD and the other is a 4TB brand new WD blue. When both drives are plugged in together, whatever drive was plugged in second has read speeds of 0.5kb, making it basically unusable. It also takes forever to boot into windows when both are plugged in, and when it finally does it is extremely unresponsive and task manager will crash constantly.

Any assistance would be greatly appreciated as I have no idea what to do, thank you in advance.

specs: Ryzen 9 - 5900x
32gb Corsair vengeance
MSI 1080ti
Corsair rm850x
MSI b550 a pro
samsung 500gb 980 pro
samsung 250gb 860 evo
samsung 1tb 870 evo

 

[Fix_that_Glitch]

Sata or M2?

samsung 500gb 980 pro
samsung 250gb 860 evo
samsung 1tb 870 evo

 

[ttwCryptic]

The drives that aren’t working are both sata,
500gb 980 pro is a m.2
250gb 860 is an ssd
1tb 870 is an ssd