Problems of reverse links index (RLI) data storage for thematic internet-rank calculating system are being examined in this article. Common data storage methods examination criterions are being specified. The advantages and disadvantages of various ways of data storing are being considered and analyzed with regard to RLI data storage. The development of the new method of storing of the RLI data and its implementation for the FAT32 file system are described. A comparison and analyze of these methods are given in this article. The best solution is given.