a detector for detecting a size of specific data existing between a head location of said image file and a head location of said image data; and

a first transferor for transferring to said internal memory said specific data and said image data in this order when the size of said specific data satisfies a first condition, wherein each address forming said internal memory has a capacity of an L byte (L: integer of two or more), said recording medium is divided into a plurality of unit areas each of which has a capacity an M byte (M: integral multiple of the L), and said first condition is a condition that the size of said specific data is an integral multiple of said L byte.