Changing a Terraform backend block changes Terraform’s expected state location.
It does not move the state snapshot automatically.
This lesson explains why terraform init -migrate-state exists, how Terraform validates the new backend, and why -reconfigure can disconnect Terraform from existing infrastructure ownership.
The video also breaks down S3 backend locking, backend initialization order, and post-migration verification using terraform state list and terraform plan.
A migrated backend should preserve resource addresses and produce a clean no-op plan.