VPN is mostly a point to point ( or site to site) does not really care the end points are in cloud or local. its only a secure pipe to transfer data between end points. not sure what you meant by re-encrypt

Do you mean: "will the VPN access to some data result in encrypting of this data in transit even if the data is already encrypted on a remote storage system"?

If so, the answer is yes - independently from the storage place (cloud or no cloud). VPN encrypts all data traffic between you and the remote system/LAN without analyzing the data.

Agree with Denis. Although it is convenient to think of a vpn as a form of dedicated point to point circuit, it is simply a packet with a source and destination. The source encrypts the original packet and the destination decrypts it. The source does not regard the data as anything more than bytes of data; the source encrypts the bytes when sending to the destination irrespective of whether it is already encrypted.

My colleagues in the search.G ,Thank you all for your answer Wish you progress in science and knowledge..Sashank Dara,Denis Havlik,James Hardy