Spatie\Backup\BackupDestination\BackupDestination::write PHP Method

    public function write(string $file)
    {
        if (is_null($this->disk)) {
            throw InvalidBackupDestination::diskNotSet();
        }
        $destination = $this->backupName . '/' . pathinfo($file, PATHINFO_BASENAME);
        $handle = fopen($file, 'r+');
        $this->disk->getDriver()->writeStream($destination, $handle);
    }