From time to time my computer (Windows 10) starts working too slowly, and it takes a very long time to turn off.
I am pretty sure that it has something to do with my second HDD. I have the operating system in C:\ but some of the files are stored in D:\ (a second internal disk), and when this happens I can check that the software that uses data from D:\ are the ones that don't respond. Additionaly, I can see in "This PC" that D:\ doesn't appear.
However, when I turn the computer on again everything works perfectly. I don't know if the disk is broken, or if it's a cable connection problem.
I would appreciate very much some ideas of how I can check what is wrong before buying a new HDD if the problem is not fixable.