A method for file access includes accessing, by a processor, a file which is divided and stored in data area including a plurality of access units on the base of an access unit management table, the accessing including using a first table included in the access unit management table, the first table including a first management information corresponding to a first access unit and indicating that the first access unit and a second access unit following the first access unit in chains are located in continuous addresses and a second management information corresponding to the first access unit and indicating that the first access unit and the second access unit are located in discontinuous addresses, and using a second table included in the access unit management table, the second table including access unit identification information of the first and the second access units which are located in the discontinuous addresses.