I bought a new SSD and installed Windows on it, but I kept my old HDD attached just in case I need something. However, even if I don't use anything on the HDD, I can still hear it making noises.
This happens especially when I change the program I'm using, even when all the programs and files I am using are on the SSD. The noise is not a problem; the problem is that whenever the HDD is making noises everything is slow.
After I use the same program for a minute or two, the HDD stops making sounds and everything is smooth again.
What could be causing this?