In order to prevent memory cells from being damaged, the present invention provides a data storage method for an electronic device including dividing a first section of a memory of the electronic device into N blocks, wherein the N blocks is a sequence of blocks from the first block to the Nth block and each block is assigned an index value, rewriting the index value corresponding to the nth block according to index values of the N blocks, and storing an input data in the nth block, wherein N is an integer greater than 1, and 1≦n≦N.