diff --git a/browser/form.py b/browser/form.py
index c3fb02a..3f265b7 100644
--- a/browser/form.py
+++ b/browser/form.py
@@ -172,7 +172,7 @@ class EditObject(FormController):
         form = self.request.form
         ti = IType(obj).typeInterface
         if ti is not None:
-            adapted = IType(obj).typeInterface(obj)
+            adapted = ti(obj)
         else:
             adapted = obj
         for k in form.keys():
diff --git a/browser/loops.css b/browser/loops.css
index 60c1526..813d253 100644
--- a/browser/loops.css
+++ b/browser/loops.css
@@ -7,7 +7,7 @@
 
 a[href]:hover {
     text-decoration: none;
-    color: #c00048;
+    color: #803000;
 }
 
 pre {
diff --git a/configure.zcml b/configure.zcml
index 08d315a..408316a 100644
--- a/configure.zcml
+++ b/configure.zcml
@@ -319,6 +319,15 @@
              set_schema="loops.interfaces.IFile" />
   </class>
 
+  <adapter factory="loops.resource.ExternalFileAdapter" trusted="True"
+           provides="loops.interfaces.IExternalFile" />
+  <class class="loops.resource.ExternalFileAdapter">
+    <require permission="zope.View"
+             interface="loops.interfaces.IFile" />
+    <require permission="zope.ManageContent"
+             set_schema="loops.interfaces.IFile" />
+  </class>
+
   <adapter factory="loops.resource.NoteAdapter" trusted="True" />
   <class class="loops.resource.NoteAdapter">
     <require permission="zope.View"
@@ -345,6 +354,13 @@
            name="application/pdf"
            factory="cybertools.text.pdf.PdfTransform" />
 
+  <!-- utilities -->
+
+  <utility
+      factory="cybertools.storage.filesystem.instanceVarSubdirectoryStorage"
+      name="varsubdir"
+      />
+
   <vocabulary
       factory="loops.concept.ConceptTypeSourceList"
       name="loops.conceptTypeSource"
diff --git a/resource.py b/resource.py
index bb75018..f186d43 100644
--- a/resource.py
+++ b/resource.py
@@ -48,7 +48,7 @@ from cybertools.text.interfaces import ITextTransform
 from cybertools.typology.interfaces import IType, ITypeManager
 
 from interfaces import IBaseResource, IResource
-from interfaces import IFile, INote
+from interfaces import IFile, IExternalFile, INote
 from interfaces import IDocument, ITextDocument, IDocumentSchema, IDocumentView
 from interfaces import IMediaAsset, IMediaAssetView
 from interfaces import IResourceManager, IResourceManagerContained
@@ -212,6 +212,8 @@ class FileAdapter(ResourceAdapterBase):
 
 class ExternalFileAdapter(FileAdapter):
 
+    implements(IExternalFile)
+
     @Lazy
     def externalAddress(self):
         # or is this an editable attribute?
@@ -229,14 +231,15 @@ class ExternalFileAdapter(FileAdapter):
 
     @Lazy
     def storageParams(self):
-        return self.options.get('storage_parameters')
+        params = self.options.get('storage_parameters') or 'extfiles'
+        return dict(subdirectory=params)
 
     def setData(self, data):
         storage = component.getUtility(IExternalStorage, name=self.storageName)
         storage.setData(self.externalAddress, data, params=self.storageParams)
 
     def getData(self):
-        storage = component.getUtility(IExternalStorage)
+        storage = component.getUtility(IExternalStorage, name=self.storageName)
         return storage.getData(self.externalAddress, params=self.storageParams)
 
     data = property(getData, setData)
@@ -319,7 +322,8 @@ class IndexAttributes(object):
             if transform is not None:
                 rfa = component.queryAdapter(IReadFile, adapted)
                 if rfa is None:
-                    return transform(StringIO(context.data))
+                    data = transform(StringIO(adapted.data))
+                    return data
                 else:
                     return transform(rfa)
         if not context.contentType.startswith('text'):
diff --git a/type.py b/type.py
index d49e52d..a810395 100644
--- a/type.py
+++ b/type.py
@@ -33,7 +33,8 @@ from cybertools.typology.type import BaseType, TypeManager
 from cybertools.typology.interfaces import ITypeManager
 from loops.interfaces import ILoopsObject, IConcept, IResource
 from loops.interfaces import ITypeConcept
-from loops.interfaces import IResourceAdapter, IFile, IImage, ITextDocument, INote
+from loops.interfaces import IResourceAdapter, IFile, IExternalFile, IImage
+from loops.interfaces import ITextDocument, INote
 from loops.concept import Concept
 from loops.resource import Resource, Document, MediaAsset
 from loops.common import AdapterBase
@@ -265,7 +266,7 @@ class TypeInterfaceSourceList(object):
 
     implements(schema.interfaces.IIterableSource)
 
-    typeInterfaces = (ITypeConcept, IFile, ITextDocument, INote)
+    typeInterfaces = (ITypeConcept, IFile, IExternalFile, ITextDocument, INote)
 
     def __init__(self, context):
         self.context = context