Unlimited Cloud Storage stores data offsite to the Barracuda Cloud based on your retention policies.
Unlimited Cloud Storage is limited by the maximum capacity of the Barracuda Backup (BBS) appliance. Replication from box-to-cloud is simply a mirror of the data backed up on the source, with the exception of offsite vaulting. If offsite vaulting is configured, it is possible for more data to be stored in the cloud or on another appliance configured as a replication target. Data replicated to Barracuda Cloud Storage is stored in a compressed state, so the actual usage is less than what is stored on the source appliance.