Update kubernetes operations backup section

Author: bfeshti

modules/ROOT/pages/kubernetes/operations/backup-restore.adoc

@@ -8,25 +8,67 @@ For performing backups, Neo4j uses the _Admin Service_, which is only available
 For more information, see xref:kubernetes/accessing-neo4j.adoc[Accessing Neo4j].
 ====
 
-[[kubernetes-backup-storage-options]]
-== Backup storage options
+[[kubernetes-backup-modes]]
+== Backup modes
 
-Neo4j's Helm chart supports both full and differential backups and can be configured to use cloud providers or local storage.
+Neo4j's Helm chart supports two backup modes:
 
-=== Cloud storage
+=== Cloud provider mode
 
-Neo4j Helm chart uses Neo4j's native cloud storage integration with direct upload to create immutable backup objects.
-This allows you to back up your Neo4j databases directly to cloud storage without the need for persistent volumes.
-The chart can be configured to use cloud providers, such as AWS S3, Google Cloud Storage, and Azure Blob Storage, by setting the `cloudProvider` parameter to `aws`, `gcp`, or `azure` in the _backup-values.yaml_ file.
+Cloud provider mode uses Neo4j's native cloud storage integration with direct upload to create immutable backup objects.
 
-The following features are supported:
+* *Supported providers*: AWS S3, Google Cloud Storage, and Azure Blob Storage.
+* *Benefits*: No persistent volume requirements. Supports differential backups and immutable backup objects.
+* *Configuration*: Set `cloudProvider` to `aws`, `gcp`, or `azure`.
+
+=== Local mode
+
+Local mode creates local backups in `/backups` mount.
+
+* *Requirements*: Persistent storage for large databases (configured via `tempVolume`).
+* *Configuration*: Leave `cloudProvider` empty.
+
+[[kubernetes-cloud-native-features]]
+== Cloud-native backup features
+
+When using cloud providers, Neo4j's native backup provides:
 
 * *Direct cloud storage upload* - No intermediate local storage required.
 * *Differential backup chains* with `preferDiffAsParent: true`.
 * *Immutable backup objects* in cloud storage.
 * *Support for S3-compatible endpoints*.
 * *Enhanced S3 configuration* including custom CA certificates and endpoint settings.
 
+[[kubernetes-differential-backups]]
+== Differential backups
+
+For cloud providers, differential backups eliminate the need for persistent volumes:
+
+[source, yaml, subs="attributes+,+macros"]
+----
+backup:
+  cloudProvider: "aws"
+  bucketName: "my-backups"
+  preferDiffAsParent: true
+  type: "AUTO"  # First backup will be FULL, subsequent ones DIFF
+  fallbackToFull: true  # Fallback to FULL if DIFF fails
+----
+
+**How it works:**
+
+. The first backup creates a full backup in the cloud storage.
+. Subsequent backups create differential backups that reference the cloud-stored full backup.
+. No local storage of previous backups is required.
+
+[NOTE]
+====
+`preferDiffAsParent` is fully supported and eliminates the need for persistent volumes.
+
+* *Helm Value*: `backup.preferDiffAsParent: true`.
+* *Cloud-Native*: DIFF backups reference cloud-stored FULL backups directly.
+* *No PV Required*: Previous backups don't need to be stored locally.
+====
+
 === Local storage
 
 Local storage creates local backups in the `/backups` mount.
@@ -472,7 +514,6 @@ backup:
   s3EndpointTLS: true  # Automatically set when s3CASecretName is provided
 ----
 
-
 [[kubernetes-neo4j-backup-on-prem]]
 == Prepare to back up a database(s) to on-premises storage
 
@@ -482,6 +523,7 @@ When configuring the _backup-values.yaml_ file, keep the “cloudProvider” fie
 [NOTE]
 ====
 You need to create the persistent volume and persistent volume claim before installing the _neo4j-admin_ Helm chart only when using local storage.
+When using cloud providers, persistent volumes are not required for differential backups.
 For more information, see xref:kubernetes/persistent-volumes.adoc[Volume mounts and persistent volumes].
 ====
 
@@ -993,12 +1035,7 @@ cypher-shell -u neo4j -p <password> -d system
 ----
 DROP DATABASE neo4j;
 ----
-. Exit the Cypher Shell command-line console:
-+
-[source, shell, role='noheader']
-----
-:exit;
-----
+. Exit the Cypher Shell command-line console by typing `:exit;`.
 
 === Restore the database backup