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I presume you refer to the Finder.

Copy copies the file to the clipboard so you can paste it elsewhere.

Duplicate creates a copy of the file in the same folder, suffixed with the word "copy".

SL
 
I presume you refer to the Finder.

Copy copies the file to the clipboard so you can paste it elsewhere.

Duplicate creates a copy of the file in the same folder, suffixed with the word "copy".

SL

Thanks a lot. Isn't it redundant to have "duplicate", copy can just do the job.
 
Duplicate does copy and paste in the same location, in one function. I personally find it useful for items I know I need another copy of but haven't worked out where it's going to go yet.
 
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