diff --git a/storages/forms.py b/storages/forms.py
index d2a7ef4..38715e1 100644
--- a/storages/forms.py
+++ b/storages/forms.py
@@ -38,9 +38,7 @@ class AddStgPool(forms.Form):
     def clean_target(self):
         storage_type = self.cleaned_data["stg_type"]
         target = self.cleaned_data["target"]
-        have_symbol = re.match("^[^-][a-zA-Z0-9/_-]+$", target) and not re.match(
-            ".*/-", target
-        )
+        have_symbol = re.match("^[^-](\/?((?:[0-9a-zA-Z_])|(?:\.)|((?<!\/)-))*)+$", target)
         if storage_type in ["dir", "netfs"] and not have_symbol:
             raise forms.ValidationError(
                 _("The target must not contain any special characters")