Import index from another Elasticsearch

I have two Elasticsearch in same system and I want index with it's data from first Elasticsearch to second one in new index.
How it's done?

Snapshot / restore
Reindex from remote

can you provide some details how to do that.
documentation may help


By mistake I collapsed Elasticsearch files, now its not working. I downloaded new files of same version, could I able to retrieve my previous index from that old folder.

Have you taken snapshot of older index? If Yes follow restore API given on official doc

Nope. Is there any other option to retrieve by replacing indices folder structure on data folder

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