By pairing your on-premise source with a target (Wasabi bucket), Wasabi Cloud NAS (WCN) serves as a storage bridge and virtual storage unity that displays both your source and bucket data, as if all data were locally stored. 
To distribute data between the source and target, you can apply one or more of the following data management mechanisms:
Automatic Data Replication—Copies a file from the source to the bucket.
Space Reclaiming—Creates space on the source by replacing a replicated file with a nearline file.
Active Sync—Synchronizes the contents of multiple sources with a common bucket.
Soft Delete—Delays the deletion of a file on the bucket when the file on the source is deleted.
File Delete Mode—Deletes a replica from the bucket when the file on the source volume is deleted.