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