}
        return checksumPart;
    }

    private String getChecksum(File contentFile) {
        return checksumService.sha1(contentFile).toString();
    }

    private File getTempFile() {
        return temporaryFileProvider.createTemporaryFile("filestore", "bin");
    }

    public File whereIs(K key, String checksum) {
        return new File(baseDir, toPath(key, checksum));
    }