I'm editing with Final Cut Express and was wondering that if I have my videos saved on my internal drive, would it be bad to edit using the internal drive as opposed to an external drive? The reason I ask is because I was told by an editor and former Mac Genius that it is not good to edit with the internal drive but have since heard conflicting opinions. He said that it is taxing on the computer. Is this true? Can someone point me to an article? Any help is greatly appreciated.