On this page of discussions are TOO MANY TALES OF HORROR. I'll let them speak for themselves.
Remember that such is only a copy and not a backup. It fails on too many requirements for "backup".
HArddrives are definetly a lot quicker and can easily be updated compared with backing on cd's or discs but if I don't use the harddrive for a while will the magnets inisde begin to depolarize like on old tape cassettes or the information get lost any other way? Anyone got any advice please