Recreating lost shard data

Hi All,
Mistakenly we shut downed 3 nodes in the cluster in the same time. They
contained both the primary shard and its replica :frowning:
ES probably decided that it has lost the entire shard and created new shard
but with zero documents. We've returned those 3 previously shut downed
nodes to the cluster but the new shards still empty . So looks like we lost
the shard's data.
Fortunately we have a backup of ES data folder from the lost shard
The question is : how can we recreate the data? Will simple copy to the
empty shard resolve it?
What would you recommend?
Thank you,

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