My storage consists of two 2TB hard drives set up in RAID 1, after two years of working fine one of them has broken. I'm not sure which one is broken but I talked to some computer people I know and they are very sure it is not a software issue so one of them must be. I haven't done anything yet because I don't know what to do but I assume I have to do something in BIOS or something, I honestly haven't done anything like this in two years and even back then I had help. I tried reading other question's answers but I didn't understand them. thank you for the help!