43a44,92
> diff --git a/lib/backup_migrate_core/src/Filter/CompressionFilter.php b/lib/backup_migrate_core/src/Filter/CompressionFilter.php
> index 679e6c5..7c7813b 100644
> --- a/lib/backup_migrate_core/src/Filter/CompressionFilter.php
> +++ b/lib/backup_migrate_core/src/Filter/CompressionFilter.php
> @@ -209,7 +209,7 @@ class CompressionFilter extends PluginBase implements FileProcessorInterface {
>          gzclose($fp_out);
>  
>          // Get the compressed filesize and set it.
> -        $fileszc = filesize(drupal_realpath($to->realpath()));
> +        $fileszc = filesize(\Drupal::service('file_system')->realpath($to->realpath()));
>          $to->setMeta('filesize', $fileszc);
>        }
>      }
> @@ -262,7 +262,7 @@ class CompressionFilter extends PluginBase implements FileProcessorInterface {
>          bzclose($fp_out);
>  
>          // Get the compressed filesize and set it.
> -        $fileszc = filesize(drupal_realpath($to->realpath()));
> +        $fileszc = filesize(\Drupal::service('file_system')->realpath($to->realpath()));
>          $to->setMeta('filesize', $fileszc);
>        }
>      }
> @@ -309,14 +309,14 @@ class CompressionFilter extends PluginBase implements FileProcessorInterface {
>  
>      if (class_exists('ZipArchive')) {
>        $zip = new \ZipArchive();
> -      $res = $zip->open(drupal_realpath($to->realpath()), constant("ZipArchive::CREATE"));
> +      $res = $zip->open(\Drupal::service('file_system')->realpath($to->realpath()), constant("ZipArchive::CREATE"));
>        if ($res === TRUE) {
> -        $zip->addFile(drupal_realpath($from->realpath()), $from->getFullName());
> +        $zip->addFile(\Drupal::service('file_system')->realpath($from->realpath()), $from->getFullName());
>        }
>        $success = $zip->close();
>      }
>      // Get the compressed filesize and set it.
> -    $fileszc = filesize(drupal_realpath($to->realpath()));
> +    $fileszc = filesize(\Drupal::service('file_system')->realpath($to->realpath()));
>      $to->setMeta('filesize', $fileszc);
>  
>      return $success;
> @@ -334,7 +334,7 @@ class CompressionFilter extends PluginBase implements FileProcessorInterface {
>      $success = FALSE;
>      if (class_exists('ZipArchive')) {
>        $zip = new \ZipArchive();
> -      if ($zip->open(drupal_realpath($from->realpath()))) {
> +      if ($zip->open(\Drupal::service('file_system')->realpath($from->realpath()))) {
>          $filename = ($zip->getNameIndex(0));
>          if ($fp_in = $zip->getStream($filename)) {
>            while (!feof($fp_in)) {
71c120
< index 10f0979..2f988c2 100644
---
> index 10f0979..4c5b25e 100644
82a132,159
> @@ -68,13 +68,13 @@ class DrupalEncrypt extends PluginBase implements FileProcessorInterface {
>  
>    protected function _encryptFile (BackupFileReadableInterface $from, BackupFileWritableInterface $to) {
>  
> -    $path = drupal_realpath($from->realpath());
> -    $out_path = drupal_realpath($to->realpath());
> +    $path = \Drupal::service('file_system')->realpath($from->realpath());
> +    $out_path = \Drupal::service('file_system')->realpath($to->realpath());
>  
>      try {
>  
>        CryptoFile::encryptFileWithPassword($path, $out_path, $this->confGet('encrypt_password'));
> -      $fileszc = filesize(drupal_realpath($to->realpath()));
> +      $fileszc = filesize(\Drupal::service('file_system')->realpath($to->realpath()));
>        $to->setMeta('filesize', $fileszc);
>        return TRUE;
>  
> @@ -89,8 +89,8 @@ class DrupalEncrypt extends PluginBase implements FileProcessorInterface {
>  
>    protected function _decryptFile (BackupFileReadableInterface $from, BackupFileWritableInterface $to) {
>  
> -    $path = drupal_realpath($from->realpath());
> -    $out_path = drupal_realpath($to->realpath());
> +    $path = \Drupal::service('file_system')->realpath($from->realpath());
> +    $out_path = \Drupal::service('file_system')->realpath($to->realpath());
>  
>      try {
>