diff --git a/apps/terminal/api/component/storage.py b/apps/terminal/api/component/storage.py
index 0121ac18a..9465106a8 100644
--- a/apps/terminal/api/component/storage.py
+++ b/apps/terminal/api/component/storage.py
@@ -9,9 +9,9 @@ from rest_framework.decorators import action
 from rest_framework.request import Request
 from rest_framework.response import Response
 
+from common.api.mixin import CommonApiMixin
 from common.const.http import GET
 from common.drf.filters import BaseFilterSet
-from common.api.mixin import CommonApiMixin
 from terminal import const
 from terminal.filters import CommandStorageFilter, CommandFilter, CommandFilterForStorageTree
 from terminal.models import CommandStorage, ReplayStorage
@@ -30,8 +30,10 @@ class BaseStorageViewSetMixin(CommonApiMixin):
         if instance.type_null_or_server or instance.is_default:
             data = {'msg': _('Deleting the default storage is not allowed')}
             return Response(data=data, status=status.HTTP_400_BAD_REQUEST)
-        if instance.is_use():
-            data = {'msg': _('Cannot delete storage that is being used')}
+        used_by = instance.used_by()
+        if used_by:
+            names = ', '.join(list(used_by.values_list('name', flat=True)))
+            data = {'msg': _('Cannot delete storage that is being used: {}').format(names)}
             return Response(data=data, status=status.HTTP_400_BAD_REQUEST)
         return super().destroy(request, *args, **kwargs)
 
diff --git a/apps/terminal/models/component/storage.py b/apps/terminal/models/component/storage.py
index 40c0c0f79..985fc1012 100644
--- a/apps/terminal/models/component/storage.py
+++ b/apps/terminal/models/component/storage.py
@@ -105,10 +105,10 @@ class CommandStorage(CommonStorageModelMixin, JMSBaseModel):
         store = engine_mod.CommandStore(self.config)
         return store.ping(timeout=3)
 
-    def is_use(self):
+    def used_by(self):
         return Terminal.objects.filter(
             command_storage=self.name, is_deleted=False
-        ).exists()
+        )
 
     def get_command_queryset(self):
         if self.type_null:
diff --git a/apps/terminal/models/component/terminal.py b/apps/terminal/models/component/terminal.py
index 8666c5da2..b361102c4 100644
--- a/apps/terminal/models/component/terminal.py
+++ b/apps/terminal/models/component/terminal.py
@@ -158,7 +158,6 @@ class Terminal(StorageMixin, TerminalStatusMixin, JMSBaseModel):
         self.user = None
         self.is_deleted = True
         self.save()
-        return
 
     def __str__(self):
         status = "Active"
diff --git a/apps/terminal/serializers/applet_host.py b/apps/terminal/serializers/applet_host.py
index 00cabf2e7..e625fc84f 100644
--- a/apps/terminal/serializers/applet_host.py
+++ b/apps/terminal/serializers/applet_host.py
@@ -18,11 +18,13 @@ __all__ = [
     'AppletHostStartupSerializer', 'AppletSetupSerializer'
 ]
 
+RDS_LICENSE_DOC_URL = 'https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-client-access-license'
+
 
 class DeployOptionsSerializer(serializers.Serializer):
     LICENSE_MODE_CHOICES = (
-        (4, _('Per Session')),
-        (2, _('Per Device')),
+        (2, _('Per Device (Device number limit)')),
+        (4, _('Per User (User number limit)')),
     )
 
     # 单用户单会话，
@@ -44,11 +46,20 @@ class DeployOptionsSerializer(serializers.Serializer):
         """)
     )
     IGNORE_VERIFY_CERTS = serializers.BooleanField(default=True, label=_("Ignore Certificate Verification"))
-    RDS_Licensing = serializers.BooleanField(default=False, label=_("Existing RDS license"))
+    RDS_Licensing = serializers.BooleanField(
+        default=False, label=_("Existing RDS license"),
+        help_text=_('If not exist, the RDS will be in trial mode, and the trial period is 120 days. '
+                    '<a href={}>Detail</a>').format(RDS_LICENSE_DOC_URL)
+    )
     RDS_LicenseServer = serializers.CharField(default='127.0.0.1', label=_('RDS License Server'), max_length=1024)
-    RDS_LicensingMode = serializers.ChoiceField(choices=LICENSE_MODE_CHOICES, default=2, label=_('RDS Licensing Mode'))
-    RDS_fSingleSessionPerUser = serializers.ChoiceField(choices=SESSION_PER_USER, default=1,
-                                                        label=_("RDS Single Session Per User"))
+    RDS_LicensingMode = serializers.ChoiceField(
+        choices=LICENSE_MODE_CHOICES, default=2, label=_('RDS Licensing Mode'),
+    )
+    RDS_fSingleSessionPerUser = serializers.ChoiceField(
+        choices=SESSION_PER_USER, default=1, label=_("RDS Single Session Per User"),
+        help_text=_('Tips: A RDS user can have only one session at a time. If set, when next login connected, '
+                    'previous session will be disconnected.')
+    )
     RDS_MaxDisconnectionTime = serializers.IntegerField(
         default=60000, label=_("RDS Max Disconnection Time (ms)"),
         help_text=_(