Duplicate Feature

[mirrorclone]

-feature I want
-Eaxample A channel to B channel Copy
-When copying from channel A to channel B, first write the document of the files in channel B.
-After checking the files on channel b, delete the duplicate so that it does not send the same files from channel a to channel b

[m4mallu]

The pictorial representation is terrible!
Although the concept is logical, it needs some serious works to do to achieve the goal.
I Hope, someone will logically push the same...