diff --git a/system/Cache/Handlers/FileHandler.php b/system/Cache/Handlers/FileHandler.php
index 0a97a89f4862..8f63c93acb20 100644
--- a/system/Cache/Handlers/FileHandler.php
+++ b/system/Cache/Handlers/FileHandler.php
@@ -63,6 +63,8 @@ public function __construct(Cache $config)
 
         $this->mode   = $config->file['mode'] ?? 0640;
         $this->prefix = $config->prefix;
+
+        helper('filesystem');
     }
 
     /**
@@ -96,7 +98,7 @@ public function save(string $key, $value, int $ttl = 60)
             'data' => $value,
         ];
 
-        if ($this->writeFile($this->path . $key, serialize($contents))) {
+        if (write_file($this->path . $key, serialize($contents))) {
             try {
                 chmod($this->path . $key, $this->mode);
 
@@ -176,7 +178,7 @@ public function decrement(string $key, int $offset = 1)
      */
     public function clean()
     {
-        return $this->deleteFiles($this->path, false, true);
+        return delete_files($this->path, false, true);
     }
 
     /**
@@ -184,7 +186,7 @@ public function clean()
      */
     public function getCacheInfo()
     {
-        return $this->getDirFileInfo($this->path);
+        return get_dir_file_info($this->path);
     }
 
     /**
@@ -251,6 +253,8 @@ protected function getItem(string $filename)
     /**
      * Writes a file to disk, or returns false if not successful.
      *
+     * @deprecated 4.6.1 Use `write_file()` instead.
+     *
      * @param string $path
      * @param string $data
      * @param string $mode
@@ -283,6 +287,8 @@ protected function writeFile($path, $data, $mode = 'wb')
      * If the second parameter is set to TRUE, any directories contained
      * within the supplied base directory will be nuked as well.
      *
+     * @deprecated 4.6.1 Use `delete_files()` instead.
+     *
      * @param string $path   File path
      * @param bool   $delDir Whether to delete any directories found in the path
      * @param bool   $htdocs Whether to skip deleting .htaccess and index page files
@@ -318,6 +324,8 @@ protected function deleteFiles(string $path, bool $delDir = false, bool $htdocs
      *
      * Any sub-folders contained within the specified path are read as well.
      *
+     * @deprecated 4.6.1 Use `get_dir_file_info()` instead.
+     *
      * @param string $sourceDir    Path to source
      * @param bool   $topLevelOnly Look only at the top level directory specified?
      * @param bool   $_recursion   Internal variable to determine recursion status - do not use in calls
@@ -360,6 +368,8 @@ protected function getDirFileInfo(string $sourceDir, bool $topLevelOnly = true,
      * Options are: name, server_path, size, date, readable, writable, executable, fileperms
      * Returns FALSE if the file cannot be found.
      *
+     * @deprecated 4.6.1 Use `get_file_info()` instead.
+     *
      * @param string       $file           Path to file
      * @param array|string $returnedValues Array or comma separated string of information returned
      *
diff --git a/user_guide_src/source/changelogs/v4.6.1.rst b/user_guide_src/source/changelogs/v4.6.1.rst
index 495fcd1b3af5..2eb8db9600f3 100644
--- a/user_guide_src/source/changelogs/v4.6.1.rst
+++ b/user_guide_src/source/changelogs/v4.6.1.rst
@@ -26,6 +26,11 @@ Changes
 Deprecations
 ************
 
+- **Cache:** The ``FileHandler::writeFile()`` method is deprecated. Use ``write_file()`` instead.
+- **Cache:** The ``FileHandler::deleteFiles()`` method is deprecated. Use ``delete_files()`` instead.
+- **Cache:** The ``FileHandler::getDirFileInfo()`` method is deprecated. Use ``get_dir_file_info()`` instead.
+- **Cache:** The ``FileHandler::getFileInfo()`` method is deprecated. Use ``get_file_info()`` instead.
+
 **********
 Bugs Fixed
 **********