diff --git a/UPGRADING.md b/UPGRADING.md
index 0863c3908b7..15065c72aed 100644
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -427,6 +427,23 @@ The format of this change log follows the advice given at [Keep a CHANGELOG](htt
 
   For more information see [MDL-82857](https://tracker.moodle.org/browse/MDL-82857)
 
+### core_role
+
+#### Added
+
+- Move all session management to the \core\session\manager class.
+  This removes the dependancy to use the "sessions" table.
+  Session management plugins (like redis) now need to inherit
+  the base \core\session\handler class which implements
+  SessionHandlerInterface and override methods as required.
+  The following methods in \core\session\manager have been deprecated:
+  * kill_all_sessions use destroy_all instead
+  * kill_session use destroy instead
+  * kill_sessions_for_auth_plugin use destroy_by_auth_plugin instead
+  * kill_user_sessions use destroy_user_sessions instead
+
+  For more information see [MDL-66151](https://tracker.moodle.org/browse/MDL-66151)
+
 ### tool_oauth2
 
 #### Added
@@ -631,6 +648,21 @@ The format of this change log follows the advice given at [Keep a CHANGELOG](htt
 
   For more information see [MDL-75025](https://tracker.moodle.org/browse/MDL-75025)
 
+### core_files
+
+#### Added
+
+- The following are the changes made:
+  - New hook after_file_created
+  - In the \core_files\file_storage, new additional param $notify (default is true) added to:
+    - ::create_file_from_storedfile()
+    - ::create_file_from_pathname()
+    - ::create_file_from_string()
+    - ::create_file()
+    If true, it will trigger the after_file_created hook to re-create the image.
+
+  For more information see [MDL-75850](https://tracker.moodle.org/browse/MDL-75850)
+
 ### core_user
 
 #### Deprecated
diff --git a/admin/roles/UPGRADING.md b/admin/roles/UPGRADING.md
new file mode 100644
index 00000000000..1b9fd378dfa
--- /dev/null
+++ b/admin/roles/UPGRADING.md
@@ -0,0 +1,19 @@
+# core_role (subsystem) Upgrade notes
+
+## 4.5dev+
+
+### Added
+
+- Move all session management to the \core\session\manager class.
+  This removes the dependancy to use the "sessions" table.
+  Session management plugins (like redis) now need to inherit
+  the base \core\session\handler class which implements
+  SessionHandlerInterface and override methods as required.
+  The following methods in \core\session\manager have been deprecated:
+  * kill_all_sessions use destroy_all instead
+  * kill_session use destroy instead
+  * kill_sessions_for_auth_plugin use destroy_by_auth_plugin instead
+  * kill_user_sessions use destroy_user_sessions instead
+
+  For more information see [MDL-66151](https://tracker.moodle.org/browse/MDL-66151)
+
diff --git a/cache/UPGRADING.md b/cache/UPGRADING.md
index 70a103dc318..b91ecf9e3b2 100644
--- a/cache/UPGRADING.md
+++ b/cache/UPGRADING.md
@@ -41,4 +41,3 @@
   | `\cache_mode_mappings_form` | `\core_cache\form/cache_mode_mappings_form` |
 
   For more information see [MDL-82158](https://tracker.moodle.org/browse/MDL-82158)
-
diff --git a/files/UPGRADING.md b/files/UPGRADING.md
new file mode 100644
index 00000000000..e850905b530
--- /dev/null
+++ b/files/UPGRADING.md
@@ -0,0 +1,17 @@
+# core_files (subsystem) Upgrade notes
+
+## 4.5dev+
+
+### Added
+
+- The following are the changes made:
+  - New hook after_file_created
+  - In the \core_files\file_storage, new additional param $notify (default is true) added to:
+    - ::create_file_from_storedfile()
+    - ::create_file_from_pathname()
+    - ::create_file_from_string()
+    - ::create_file()
+    If true, it will trigger the after_file_created hook to re-create the image.
+
+  For more information see [MDL-75850](https://tracker.moodle.org/browse/MDL-75850)
+