A storage apparatus is provided. The controller of the storage apparatus includes an error correction module and a data disordering module. The error correction module is configured to perform an error correction procedure for a data packet to be written into a flash memory module of the storage apparatus for generating sequence data codes containing the data packet and corresponding error correcting codes, wherein the data packet includes a data area recording data to be written and a spare area recording data related to the data packet. The data disordering module is configured to convert the sequence data codes into non-sequence data codes, wherein the data of the data area and the spare area and error correcting codes are dispersed in the non-sequence data codes. Accordingly, it is possible to effectively increase the safety of the data packet.