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say I have on the external drive:


and on my hard drive I have:


I would like to drag and drop the whole folder over to the hard drive and have it ONLY copy B/file3.txt since that's the only new file and the other files did not change.

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ah ha, just type

rsync -rv test1/ test2/
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Not a lot of drag&drop there though. – Daniel Beck Mar 13 '13 at 18:30
What are test1 and 2? – martineau Mar 13 '13 at 18:34

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