diff --git a/alertmanager/helm-values/alertmanager.yaml b/alertmanager/helm-values/alertmanager.yaml
index 1fe2088..fc57a03 100644
--- a/alertmanager/helm-values/alertmanager.yaml
+++ b/alertmanager/helm-values/alertmanager.yaml
@@ -6,7 +6,7 @@ fullnameOverride: alertmanager
 persistence:
   enabled: true
   size: 1Gi
-  storageClass: local-path
+  storageClass: longhorn  # Migrated from local-path to Longhorn (replica=3)
 
 resources:
   requests:
diff --git a/grafana/helm-values/grafana.yaml b/grafana/helm-values/grafana.yaml
index 7fd8ab7..cb949f3 100644
--- a/grafana/helm-values/grafana.yaml
+++ b/grafana/helm-values/grafana.yaml
@@ -13,7 +13,7 @@ admin:
 persistence:
   enabled: true
   size: 2Gi
-  storageClass: local-path
+  storageClass: longhorn  # Migrated from local-path to Longhorn (replica=3)
 
 initChownData:
   enabled: false
diff --git a/loki/helm-values/loki.yaml b/loki/helm-values/loki.yaml
index 8cc33b2..7f74189 100644
--- a/loki/helm-values/loki.yaml
+++ b/loki/helm-values/loki.yaml
@@ -40,7 +40,7 @@ singleBinary:
   persistence:
     enabled: true
     size: 10Gi
-    storageClass: local-path
+    storageClass: longhorn  # Migrated from local-path to Longhorn (replica=3)
   resources:
     requests:
       cpu: 15m  # Reduced from 50m based on actual usage (10m)
diff --git a/prometheus/helm-values/kube-prometheus-stack.yaml b/prometheus/helm-values/kube-prometheus-stack.yaml
index 9998064..059cf26 100644
--- a/prometheus/helm-values/kube-prometheus-stack.yaml
+++ b/prometheus/helm-values/kube-prometheus-stack.yaml
@@ -44,7 +44,7 @@ prometheus:
     storageSpec:
       volumeClaimTemplate:
         spec:
-          storageClassName: local-path
+          storageClassName: longhorn  # Migrated from local-path to Longhorn (replica=3)
           accessModes: ["ReadWriteOnce"]
           resources:
             requests: