This document illustrates how to use Purity CloudSnap to offload to a bucket then replicate to another bucket by leveraging S3 cross-region-replication (CRR). This provides a third copy of data to be located off the region and can be recovered on-demand to a new Cloud Block Store in that region. This scenario can be used as an inter-region Cold Disaster Recovery or a long-term data archive.
To learn more about CloudSnap, Please refer to CloudSnap Best Practices and Users Guide, you can also check Cody Hosterman blog Configuring FlashArray Offload to AWS S3.