So the thing is, I am trying to reinstall windows on my pc. While all of my 5-6 external hard drives are connected to the pc. And windows installation completed and i open my computer, suddenly I saw my hard disk is empty. Like a new. But before windows installation I have around 2 tb of my important data. (Note: I install my on 500gb ssd). Please helping me. And tell why this happen and how I get my data back.