It might be time to replace that and get a fully modular instead of this non modular ketchup and mustard bs I have the power for the HDDs running from to PSU to one HDD and then on to the next one on the same cable. I switched them and it stopped giving me issues. I even switched back and there was nothing even after a whole bunch of restarts and stresstests in order to narrow down and find out the issue. I don't use my HDDs for other than just storing things and the one that was making sounds hasn't been used a lot so i was confused about it being broken already because it really isn't old and i don't give it a lot of physical abuse either but it makes much more sense that my 7 year old already shit from the beginning-PSU needs replacing.
And maybe i can live with it as it is for now but i'll replace it anyway because pretty much anyone who has ever tried cablemanagement with a non modular PSU in a system with a few disks and controllers for fans and such know that the term management is used very loosely. I'm glad that my case doesnt have a rear glass panel because i really wouldn't want to show that side off