diff --git a/config/packages/oneup_flysystem.yaml b/config/packages/oneup_flysystem.yaml
index 13b4e2955c..5d1658efd5 100644
--- a/config/packages/oneup_flysystem.yaml
+++ b/config/packages/oneup_flysystem.yaml
@@ -4,6 +4,10 @@ oneup_flysystem:
             local:
                 directory: '%kernel.project_dir%/var/courses'
 
+        home_adapter:
+            local:
+                directory: '%kernel.project_dir%/var/home'
+
 #        s3.adapter:
 #              awss3v3:
 #                  client: s3_client # add service "s3_client"
@@ -16,3 +20,8 @@ oneup_flysystem:
             cache: ~
             alias: ~
             mount: ~
+
+        home:
+            adapter: home_adapter
+            visibility: private
+            alias: home_filesystem
\ No newline at end of file
diff --git a/main/admin/index.php b/main/admin/index.php
index 9865fde252..3070811403 100644
--- a/main/admin/index.php
+++ b/main/admin/index.php
@@ -2,6 +2,7 @@
 /* For licensing terms, see /license.txt */
 
 use Chamilo\CoreBundle\Framework\Container;
+use League\Flysystem\Filesystem;
 
 /**
  * Index page of the admin tools.
@@ -23,7 +24,9 @@ api_protect_admin_script(true);
 $nameTools = get_lang('PlatformAdmin');
 
 $accessUrlId = 0;
-$adminExtraContentDir = api_get_path(SYS_APP_PATH)."home/admin/";
+/** @var Filesystem $fileSystem */
+$fileSystem = Container::$container->get('home_filesystem');
+$adminExtraContentDir = 'admin/';
 
 if (api_is_multiple_url_enabled()) {
     $accessUrlId = api_get_current_access_url_id();
@@ -32,7 +35,7 @@ if (api_is_multiple_url_enabled()) {
         $urlInfo = api_get_access_url($accessUrlId);
         $url = api_remove_trailing_slash(preg_replace('/https?:\/\//i', '', $urlInfo['url']));
         $cleanUrl = str_replace('/', '-', $url);
-        $adminExtraContentDir = api_get_path(SYS_APP_PATH)."home/$cleanUrl/admin/";
+        $adminExtraContentDir = "$cleanUrl/admin/";
     }
 }
 
@@ -82,8 +85,8 @@ $blocks['users']['class'] = 'block-admin-users';
 
 $usersBlockExtraFile = "{$adminExtraContentDir}block-admin-users_extra.html";
 
-if (file_exists($usersBlockExtraFile)) {
-    $blocks['users']['extraContent'] = file_get_contents($usersBlockExtraFile);
+if ($fileSystem->has($usersBlockExtraFile)) {
+    $blocks['users']['extraContent'] = $fileSystem->read($usersBlockExtraFile);
 }
 
 $search_form = '
@@ -148,8 +151,8 @@ if (api_is_platform_admin()) {
 
     $coursesBlockExtraFile = "{$adminExtraContentDir}block-admin-courses_extra.html";
 
-    if (file_exists($coursesBlockExtraFile)) {
-        $blocks['courses']['extraContent'] = file_get_contents($coursesBlockExtraFile);
+    if ($fileSystem->has($coursesBlockExtraFile)) {
+        $blocks['courses']['extraContent'] = $fileSystem->read($coursesBlockExtraFile);
     }
 
     $search_form = ' <form method="get" class="form-inline" action="course_list.php">
@@ -207,8 +210,8 @@ if (api_is_platform_admin()) {
 
     $platformBlockExtraFile = "{$adminExtraContentDir}block-admin-platform_extra.html";
 
-    if (file_exists($platformBlockExtraFile)) {
-        $blocks['platform']['extraContent'] = file_get_contents($platformBlockExtraFile);
+    if ($fileSystem->has($platformBlockExtraFile)) {
+        $blocks['platform']['extraContent'] = $fileSystem->read($platformBlockExtraFile);
     }
 
     $search_form = ' <form method="get" action="'.api_get_path(WEB_PUBLIC_PATH).'admin/settings/search_settings'.'" class="form-inline">
@@ -298,8 +301,8 @@ $blocks['sessions']['class'] = 'block-admin-sessions';
 
 $sessionsBlockExtraFile = "{$adminExtraContentDir}block-admin-sessions_extra.html";
 
-if (file_exists($sessionsBlockExtraFile)) {
-    $blocks['sessions']['extraContent'] = file_get_contents($sessionsBlockExtraFile);
+if ($fileSystem->has($sessionsBlockExtraFile)) {
+    $blocks['sessions']['extraContent'] = $fileSystem->read($sessionsBlockExtraFile);
 }
 
 if (api_is_platform_admin()) {
@@ -682,22 +685,7 @@ if (api_is_platform_admin()) {
         $extraData = array_map(['Security', 'remove_XSS'], $extraData);
 
         if (!empty($extraData['block'])) {
-            if (!is_dir($adminExtraContentDir)) {
-                mkdir(
-                    $adminExtraContentDir,
-                    api_get_permissions_for_new_directories(),
-                    true
-                );
-            }
-
-            if (!is_writable($adminExtraContentDir)) {
-                die;
-            }
-
-            $fullFilePath = $adminExtraContentDir.$extraData['block'];
-            $fullFilePath .= "_extra.html";
-
-            file_put_contents($fullFilePath, $extraData['extra_content']);
+            $fileSystem->put('admin/'.$extraData['block'].'_extra.html', $extraData['extra_content']);
 
             header('Location: '.api_get_self());
             exit;
diff --git a/main/inc/ajax/admin.ajax.php b/main/inc/ajax/admin.ajax.php
index ede7638720..ff7cb68292 100755
--- a/main/inc/ajax/admin.ajax.php
+++ b/main/inc/ajax/admin.ajax.php
@@ -3,6 +3,8 @@
 
 use Chamilo\CoreBundle\Entity\BranchSync;
 use Chamilo\CoreBundle\Entity\Repository\BranchSyncRepository;
+use Chamilo\CoreBundle\Framework\Container;
+use League\Flysystem\Filesystem;
 
 /**
  * Responses to AJAX calls.
@@ -43,34 +45,27 @@ switch ($action) {
             die;
         }
 
+        /** @var Filesystem $fileSystem */
+        $fileSystem = Container::$container->get('home_filesystem');
+        $dir = 'admin/';
+
         if (api_is_multiple_url_enabled()) {
             $accessUrlId = api_get_current_access_url_id();
 
-            if ($accessUrlId == -1) {
-                die;
+            if ($accessUrlId != -1) {
+                $urlInfo = api_get_access_url($accessUrlId);
+                $url = api_remove_trailing_slash(preg_replace('/https?:\/\//i', '', $urlInfo['url']));
+                $cleanUrl = str_replace('/', '-', $url);
+                $dir = "$cleanUrl/admin/";
             }
-
-            $urlInfo = api_get_access_url($accessUrlId);
-            $url = api_remove_trailing_slash(preg_replace('/https?:\/\//i', '', $urlInfo['url']));
-            $cleanUrl = str_replace('/', '-', $url);
-            $newUrlDir = api_get_path(SYS_APP_PATH)."home/$cleanUrl/admin/";
-        } else {
-            $newUrlDir = api_get_path(SYS_APP_PATH)."home/admin/";
         }
 
-        if (!file_exists($newUrlDir)) {
-            die;
-        }
+        $filePath = $dir.$blockName.'_extra.html';
 
-        if (!Security::check_abs_path("{$newUrlDir}{$blockName}_extra.html", $newUrlDir)) {
-            die;
-        }
-
-        if (!file_exists("{$newUrlDir}{$blockName}_extra.html")) {
-            die;
+        if ($fileSystem->has($filePath)) {
+            echo $fileSystem->read($dir.$blockName.'_extra.html');
         }
 
-        echo file_get_contents("{$newUrlDir}{$blockName}_extra.html");
         break;
 }