diff --git a/Collection-Storage.md b/Collection-Storage.md
index f8ee2a9..92c9004 100644
--- a/Collection-Storage.md
+++ b/Collection-Storage.md
@@ -10,45 +10,41 @@
 └─[d] /lib
   └─[d] /radicale
     └─[d] /collections
+      ├─[d] /collection-shared (optional)
+      │ ├─[d] sharedcalendar1 (Collection)
+      │ │ ├─[d] .Radicale.cache (automatic generated)
+      │ │ ├─[f] .Radicale.props (set: VEVENT)
+      │ │ ├─[f] sharedschedule1.ics
+      │ │ ├─[f] ...
+      │ │ └─[f] sharedscheduleX.ics
+      │ └─[d] sharedaddressbook1 (Collection)
+      │   ├─[d] .Radicale.cache (automatic generated)
+      │   ├─[f] .Radicale.props (set: VJOURNAL)
+      │   ├─[f] sharedcontact1.vcf
+      │   ├─[f] ...
+      │   └─[f] sharedcontactX.vcf
+      │
       └─[d] /collection-root
         ├─[d] USER1
-        │ ├─[d] MyCalendar (Collection)
+        │ ├─[d] mycalendar1 (Collection)
         │ │ ├─[d] .Radicale.cache (automatic generated)
         │ │ ├─[f] .Radicale.props (set: VEVENT)
         │ │ ├─[f] schedule1.ics
         │ │ ├...
         │ │ └─[f] scheduleX.ics
-        │ ├─[d] MyAddressbook (Collection)
+        │ ├─[d] myaddressbook1 (Collection)
         │ │ ├─[d] .Radicale.cache (automatic generated)
         │ │ ├─[f] .Radicale.props (set: VJOURNAL)
         │ │ ├─[f] contact1.vcf
         │ │ ├...
         │ │ └─[f] contactX.vcf
-        │ ├─[l] GroupAddressbook1 -> ../SHARED/GroupAddressbook1
-        │ └─[l] GroupCalendar1 -> ../SHARED/GroupCalendar1
+        │ ├─[l] sharedcalendar1 -> ../../collection-shared/sharedcalendar1
+        │ └─[l] sharedaddressbook1 -> ../../collection-shared/sharedaddressbook1
         │
         ├─[d] USER2
         │ ├ ...
         │ ├─[l] GroupAddressbook2 -> ../SHARED/GroupAddressbook2
         │ └─[l] GroupCalendar2 -> ../SHARED/GroupCalendar2
-        │
-        └─[d] SHARED
-          ├─[d] GroupCalendar1 (Collection)
-          │ ├─[d] .Radicale.cache (automatic generated)
-          │ ├─[f] .Radicale.props (set: VEVENT)
-          │ ├─[f] sharedschedule1.ics
-          │ ├─[f] ...
-          │ └─[f] sharedscheduleX.ics
-          ├─[d] GroupCalendar2 (Collection)
-          ...
-          ├─[d] GroupAddressbook1 (Collection)
-          │ ├─[d] .Radicale.cache (automatic generated)
-          │ ├─[f] .Radicale.props (set: VJOURNAL)
-          │ ├─[f] sharedcontact1.vcf
-          │ ├─[f] ...
-          │ └─[f] sharedcontactX.vcf
-          ├─[d] GroupAddressbook2 (Collection)
-          ...
 ```
 
 ## Collection