HM\BackUpWordPress\Path::calculate_path PHP Method

    public function calculate_path()
    {
        $paths = array();
        // If we have a custom path then try to use it.
        if ($this->get_custom_path()) {
            $paths[] = $this->get_custom_path();
        }
        // If there is already a backups directory then try to use that.
        if ($this->get_existing_path()) {
            $paths[] = $this->get_existing_path();
        }
        // If not then default to a new directory in wp-content.
        $paths[] = $this->get_default_path();
        // If that didn't work then fallback to a new directory in uploads.
        $paths[] = $this->get_fallback_path();
        // Loop through possible paths, use the first one that exists/can be created and is writable.
        foreach ($paths as $path) {
            if (wp_mkdir_p($path) && file_exists($path) && wp_is_writable($path)) {
                // Also handles fixing perms / directory already exists.
                $this->path = $path;
                break;
            }
        }
    }