Patent ID: 8386743

Claim:
A data update system including a memory device, said data update system capable of performing communication with a navigation device that has a storage medium divided into a plurality of partitions and updating data of the storage medium, the data update system comprising: directory creation means for creating a directory structure in the memory device of the data update system by obtaining partition names of partitions in the storage medium and creating in the memory device a directory structure that corresponds to a structure of the partitions in the storage medium, wherein directory names of the directories in the directory structure created in the memory device are identical to partition names of the partitions in the storage medium; image file generation means for generating an image file of updated data content that is to be stored within the partitions of the storage medium of the navigation device, wherein the data update system stores in the memory device of the data update system the image file of updated data content that is generated by the image file generation means, said image file being stored in a directory of the directory structure created by the directory creation means; and data update means for writing data contents of the image file to the partitions of the storage medium, wherein the image file is read from the directory corresponding to the partitions.