that copy/paste or drag and drop duplicate files. Both inside the same folder (they should get another filename then, of course) and into another folder.
So, somehow, I'm afraid you're doing something wrong.
I have recently upgraded my external hard drive form 150 to 500gb. i have tried to pull all music files over from the 150gb to the 500gb and it seems as if it is duplicating them. The 500 gb should be saying 350gb remaining but in stead only 150 gb remaining. (in a sense the songs are come over three times instead of one). is there an easy (faster) way of deleting the duplicated files instead of individual. i have tried to delete everything and start over but it doesnt help.