One last go.

templates/Nextcloud/0/docker-compose.yml

@@ -67,12 +67,18 @@ volumes:
   Application:
     driver: rancher-nfs
     driver_opts:
+      host: 10.0.10.21
+      export: /RancherCattleData/${DATA_DIR}/Application
       onRemove: retain
   UserData:
     driver: rancher-nfs
     driver_opts:
+      host: 10.0.10.21
+      export: /RancherCattleData/${DATA_DIR}/UserData
       onRemove: retain
   Database:
     driver: rancher-nfs
     driver_opts:
+      host: 10.0.10.21
+      export: /RancherCattleData/${DATA_DIR}/Database
       onRemove: retain

templates/Nextcloud/0/rancher-compose.yml

@@ -56,13 +56,13 @@ catalog:
       required: true
       type: password
 
-#    - variable: DATA_DIR
-#      label: "Data Directory"
-#      description: |
-#        The directory within the stack directory to store data
-#      default: "Nextcloud/Personal"
-#      required: true
-#      type: string
+    - variable: DATA_DIR
+      label: "Data Directory"
+      description: |
+        The directory within the stack directory to store data
+      default: "Nextcloud/Personal"
+      required: true
+      type: string
 
 services:
   nextcloud: