So my HDD has been clunking for quite a while now. I thought it must be a normal thing, as it has always done it. However, I recently did some research, and many sites claim that the clunking means my drive is failing. Its been like that for months, and I have seen nothing bad happen, it has not slowed down etc. It randomly seems to clunk when I'm using the computer, even if I'm not using the disk (less than 10% usage). Should I consider replacing my hard drive? Or is it just a normal thing? Any input would be appreciated, as I do not want to lose all my data!