diff --git a/Collection-Storage.md b/Collection-Storage.md
index a2b69e1..f8ee2a9 100644
--- a/Collection-Storage.md
+++ b/Collection-Storage.md
@@ -1,15 +1,68 @@
 # Radicale >= 3.0.0
 
+## Example for a storage layout incl. shared calendar/addressbook
+* `[d]`: directory
+* `[f]`: file
+* `[l]`: softlink
+
+```
+[d] /var
+└─[d] /lib
+  └─[d] /radicale
+    └─[d] /collections
+      └─[d] /collection-root
+        ├─[d] USER1
+        │ ├─[d] MyCalendar (Collection)
+        │ │ ├─[d] .Radicale.cache (automatic generated)
+        │ │ ├─[f] .Radicale.props (set: VEVENT)
+        │ │ ├─[f] schedule1.ics
+        │ │ ├...
+        │ │ └─[f] scheduleX.ics
+        │ ├─[d] MyAddressbook (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
+        │
+        ├─[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
+
 Collection on storage is always a directory containing
 
-## Files: *.ics / *.vcf
+### Files: *.ics / *.vcf
 
 | **Collection Type** | **Files** |
 |-|-|
 | VCALENDAR | *.ics |
 | VADDRESSBOOK | *.vcf |
 
-## File: .Radicale.props
+### File: .Radicale.props
 
 Property file of collection
 
@@ -26,17 +79,17 @@ jq . .Radicale.props
 }
 ```
 
-## Directory: .Radicale.cache
+### Directory: .Radicale.cache
 
-### Directory: .Radicale.cache/history
+#### Directory: .Radicale.cache/history
 
 (TODO)
 
-### Directory: .Radicale.cache/item
+#### Directory: .Radicale.cache/item
 
 (TODO)
 
-### Directory: .Radicale.cache/sync-token
+#### Directory: .Radicale.cache/sync-token
 
 (TODO)