Hello ,
I try to restore a snapshot located on another local reader (B:)
The Elasticsearch directory is located on C:
here the snapshot content located on B:\

what spets should I follow to restore this snapshot ?
once done , is it possible to remove the snapshot or ES stills need it ?
thanks
Assuming you have a single node, you can register this directory as a read-only repository with Elasticsearch: Snapshot module | Elasticsearch Guide [8.11] | Elastic
Then restore this snapshot: Snapshot module | Elasticsearch Guide [8.11] | Elastic
If you have multiple nodes then you need to set up a shared filesystem or a read-only URL repository.
Once the restore has succeeded, Elasticsearch does not need the repository any more. You can deregister the repository with DELETE /_snapshot/{repository}.