So i am a new switcher to OSX, I really like it. (Before this I was using vista which I really enjoyed, more then XP I don't care what anyone else says). Anyway I got an external HD and decided to move my music folder to it to save space (I have 106GBs of music/movies all legal in my iTunes library). Anyway I realized I was copying it to the wrong HD so I canceled the move and because it left stuff I decided to do what I used to do in windows... merge the folders, so I dragged it back and it told me it would replace it. In windows it would say it would replace any files that were the same I assumed thats what it meant this time but no of course not as you know it replaces the whole folder. So i just lost all my Music/Movies and I am now in the process of getting them off my old computer (Which is really screwed up the mobo or Power Supply is fried it takes about 50-100 presses on the power button to boot). Anyway I learned my lesson my question is... is there any other differences (That can be data Threatening like this) between windows and OSX that I should be aware of?