Flamingo Blog.

What email archiving is and how it differs from backup, what Microsoft 365 keeps by default, the retention periods SEC 17a-4, FINRA, HIPAA and GDPR set, how legal holds work, and a retention policy template you can fill in this week.

What immutable backups are, how S3 Object Lock, Azure immutable storage and hardened repositories enforce the lock, how immutability differs from air-gapped and offline copies, what it still does not protect, and how to test it.

What disaster recovery as a service is, how it differs from backup, BaaS and BCDR, how failover and failback work, what DRaaS really costs line by line, and when it is worth buying.

Enterprise backup compared by architecture: appliance, software on your own storage, direct-to-cloud and hybrid, with 3-2-1-1-0, RPO and RTO sizing, restore testing and a buyer checklist for IT teams.