File processing apparatus and file processing method

According to one embodiment, a file processing apparatus includes a file group generator, a divided file generator, and a recorder. The file group generator is configured to generate a file group formed by a plurality of first processing target files each having a size less than a threshold size of processing target files. The divided file generator is configured to generate first divided files by dividing the file group, and to generate second divided files by dividing a second processing target file having a size not less than the threshold size of the processing target files. The recorder is configured to record the first and second divided files.