Cloud sync: updated text

app/src/main/res/values/strings.xml

@@ -980,7 +980,10 @@
     <string name="title_experimental" translatable="false">This is an experimental feature!</string>
 
     <string name="title_advanced_cloud_info" translatable="false">This feature is for synchronizing data between devices</string>
-    <string name="title_advanced_cloud_security" translatable="false">All data is encrypted end-to-end and the cloud server will never see the username, password and data</string>
+    <string name="title_advanced_cloud_security" translatable="false">
+        All data is encrypted end-to-end and the cloud server will never see the username, password and data.
+        Data on the cloud server will be automatically deleted after one month of inactivity.
+    </string>
     <string name="title_advanced_cloud_login" translatable="false">Login</string>
     <string name="title_advanced_cloud_register" translatable="false">Logging in for the first time will automatically create an account</string>
     <string name="title_advanced_cloud_invalid" translatable="false">Invalid username or password</string>