Copying data from one elastic server to different elastic server for specific time interval

We have 2 different elastic search servers, both having same version(5.5.2). 1st elastic search server has latest up to date data. Second server is having stale data, which is like a back up of one weeks old data. We copied the entire data folder from server 1 like a week ago. We need to only copy data for the a week from server 1 to server 2. Please suggest how to do so.
We have an index pattern of [rpa-trans-]YYYY.MM.DD. This index uses a time-based index pattern which repeats Daily

instead of copying files around from one cluster to another, take a look at snapshot & restore or reindex from remote

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