diff --git a/Doc/Sd1/statements.xml b/Doc/Sd1/statements.xml
index 3f6f64448dd2bff8e796ef183e5d4b64536f8f53..4ddda07d8f46b53132f0862b13551e8252c97743 100644
--- a/Doc/Sd1/statements.xml
+++ b/Doc/Sd1/statements.xml
@@ -3179,7 +3179,7 @@ for (int row = 0; row < numberOfRows; row++) {
                 linkend="glo_CSS"/> you may want to postpone this exercise
                 until <xref linkend="glo_HTML"/> and <xref linkend="glo_CSS"/>
                 have been thoroughly covered in <link
-                xlink:href="https://www.hdm-stuttgart.de/studenten/stundenplan/vorlesungsverzeichnis/vorlesung_detail?vorlid=5213267">related
+                xlink:href="https://www.hdm-stuttgart.de/studierende/stundenplan/vorlesungsverzeichnis/vorlesung_detail?vorlid=5213267">related
                 lectures</link>.</para>
 
                 <tip>
diff --git a/Doc/Sda1/dom.xml b/Doc/Sda1/dom.xml
index cc73be21ef07570ee260a8bb98855375b0227ed0..0c7a6962bb664b0f44597f92e371f9a53b441e4e 100644
--- a/Doc/Sda1/dom.xml
+++ b/Doc/Sda1/dom.xml
@@ -713,7 +713,7 @@ Document contains 15 elements and 3 attributes.</screen>
           <qandaentry>
             <question>
               <para>As a courtesy we remind all participants to functional
-              programming elements being dealt with in <link xlink:href="https://www.hdm-stuttgart.de/studenten/stundenplan/vorlesungsverzeichnis/vorlesung_detail?vorlid=5211589" xml:lang="de">Softwareentwicklung 2</link>.</para>
+              programming elements being dealt with in <link xlink:href="https://www.hdm-stuttgart.de/studierende/stundenplan/vorlesungsverzeichnis/vorlesung_detail?vorlid=5211589" xml:lang="de">Softwareentwicklung 2</link>.</para>
 
               <para>This exercise has been derived from <link xlink:href="https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html">Lambda
               Expressions - The Javaâ„¢ Tutorials</link>. Depending on your own
diff --git a/Doc/Sdi/cloud.xml b/Doc/Sdi/cloud.xml
new file mode 100644
index 0000000000000000000000000000000000000000..12e3d5021b4ec39eacf4ec9b6ca47b8599c2cbab
--- /dev/null
+++ b/Doc/Sdi/cloud.xml
@@ -0,0 +1,93 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<chapter annotations="slide" version="5.1" xml:id="cloud"
+         xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xmlns:xila="http://www.w3.org/2001/XInclude/local-attributes"
+         xmlns:xi="http://www.w3.org/2001/XInclude"
+         xmlns:trans="http://docbook.org/ns/transclusion"
+         xmlns:svg="http://www.w3.org/2000/svg"
+         xmlns:m="http://www.w3.org/1998/Math/MathML"
+         xmlns:html="http://www.w3.org/1999/xhtml"
+         xmlns:db="http://docbook.org/ns/docbook">
+  <title>File cloud</title>
+
+  <figure xml:id="cloud_fig_general">
+    <title>General</title>
+
+    <itemizedlist>
+      <listitem>
+        <para>Centralized remote file storage.</para>
+      </listitem>
+
+      <listitem>
+        <para>Proprietary protocols.</para>
+      </listitem>
+
+      <listitem>
+        <para> File Up- and Download.</para>
+      </listitem>
+
+      <listitem>
+        <para>Multi client synchronization.</para>
+      </listitem>
+
+      <listitem>
+        <para>Ubiquitous access.</para>
+      </listitem>
+    </itemizedlist>
+  </figure>
+
+  <figure xml:id="cloud_fig_demands">
+    <title>Customer demands</title>
+
+    <itemizedlist>
+      <listitem>
+        <para>Integrated backup.</para>
+      </listitem>
+
+      <listitem>
+        <para>Versioning.</para>
+      </listitem>
+
+      <listitem>
+        <para>Sharing on user / group level.</para>
+      </listitem>
+
+      <listitem>
+        <para>Secure access.</para>
+      </listitem>
+
+      <listitem>
+        <para>Consistent availability.</para>
+      </listitem>
+    </itemizedlist>
+  </figure>
+
+  <figure xml:id="cloud_fig_reasons">
+    <title>Driving factors</title>
+
+    <itemizedlist>
+      <listitem>
+        <para>Local hardware does not scale:</para>
+
+        <itemizedlist>
+          <listitem>
+            <para>Systems interoperability</para>
+          </listitem>
+        </itemizedlist>
+      </listitem>
+
+      <listitem>
+        <para>Storage as a service</para>
+      </listitem>
+
+      <listitem>
+        <para>Economy of scale: Cheap hardware relying on replication. </para>
+      </listitem>
+
+      <listitem>
+        <para>Distributed system.</para>
+      </listitem>
+    </itemizedlist>
+  </figure>
+</chapter>