Replace files through FTP

This thread is exactly what I need.
But of course it does not work in DRUPAL 10. (deprecated functions)
Would somebody be so kind to help me finding how to code this in D10?

Thanks in advance

I have added this this piece of code in a controller in D10.
May be there is simpler way, but It works!

private function updatevideoFilesize(){
        
        // ftech video files in file_managed table
        $db = \Drupal::service('database');
        $query = $db->select('file_managed', 't')->fields('t', ['fid','uri', 'filesize']);
        $query->condition('filemime', "video%", 'LIKE');
        $videofiles = $query->execute()->fetchAll();
        
        // variable to be filled with processing reports during the loop
        $output = ''; 
        
        // Loop through the files 
        foreach ($videofiles as $file) {
            
            //$output.= 'fid = '.$file->fid.' | uri = '.$file->uri.' | sizeBEFORE = '.$file->filesize.'<br/>'; //debug
         
            //Load the file entity by URI
            $loadedfile = \Drupal::entityTypeManager()
                            ->getStorage('file')
                            ->loadByProperties(['uri' => $file->uri]);
             
            // Check if the file entity was loaded successfully.
            //$output.= $loadedfile ? 'successfull load YES <br/>': 'successfull load NO<br/>';//debug
            
            // Get real file size
            $stream_wrapper_manager = \Drupal::service('stream_wrapper_manager')->getViaUri($file->uri);
            $file_path = $stream_wrapper_manager->realpath();
            $realFileSize = filesize($file_path);
            
            if($realFileSize != $file->filesize){
            
                //$output.=  $file_path.' | realSIZE = '. $realFileSize.'<hr/>'; //debug
    
                // Store real size of file
                $query = $db->update('file_managed')->fields(['filesize'=>$realFileSize] );
                $query->condition ('fid',$file->fid,'=');
                $query->execute();
                
                $output .= 'fid = '.$file->fid.' | uri = '.$file->uri.'<br/>';
                $output .= 'former size = '.$file->filesize.' | new size = '.$realFileSize.'<hr/>';
                
            }//end if
            
        } //end foreach 
        
         
        $output = ($output =='')? 'No filesize to be updated' : 'Following filesizes have been uptdated.<hr/>'.$output;
        
        return $output;
        
   }//fin function