Neos\Flow\ResourceManagement\Storage\WritableFileSystemStorage::initializeObject PHP Method

    public function initializeObject()
    {
        if (!is_writable($this->path)) {
            Files::createDirectoryRecursively($this->path);
        }
        if (!is_dir($this->path) && !is_link($this->path)) {
            throw new StorageException('The directory "' . $this->path . '" which was configured as a resource storage does not exist.', 1361533189);
        }
        if (!is_writable($this->path)) {
            throw new StorageException('The directory "' . $this->path . '" which was configured as a resource storage is not writable.', 1361533190);
        }
    }