I have a 1TB OWC External HDD that I like and gives me very little problems. Thing is, I know the current reliability rate of external HDD's are not that good and I would HATE to lose tons of stuff that I have saved on my OWC HDD due to an error or a problem. Is it possible for me to buy a second external HDD to use to back-up my OWC HDD I have now? Sort of as a back-up to my back-up? A lot of this data is irreplaceable but just wondering if this is common or not?