Home > Data Protection > Data Protection (general) > Dell PowerProtect Data Domain Retention Lock > DD Retention Lock and DD Cloud Tier
Cloud Tier functionality provides the ability to increase the storage scalability of a PPDD by allowing to transition long term retention backup data on the duplicated Active Tier to a cost-effective Cloud Tier unit configured on on-premises object storage (such as ECS), or low-cost public cloud object storage tiers.
When either RL-G or RL-C are configured with Cloud Tier, the RL settings are preserved even after being transitioned to the configured cloud destination. Once the retention expires, the files on the Cloud Tier can be deleted, but not modified. When the data must be retrieved, the RL settings also remain in place. When using public cloud as a Cloud Tier destination, object storage hardening is required to preserve the data availability.