A data processing apparatus for writing data to a recording medium having a predetermined file system configured therein includes the following elements: an insertion portion that removably holds the recording medium, the data processing apparatus writing data to the recording medium inserted in the insertion portion; an insertion/removal detector that detects that the recording medium is inserted in or removed from the insertion portion; a writing state storage unit that stores, when the insertion/removal detector detects removal of the recording medium, a data writing state upon removal of the recording medium; and a restoration/analysis determining unit that determines, when the insertion/removal detector detects insertion of the recording medium, whether it is necessary to perform analysis regarding restoration of the file system configured in the inserted recording medium on the basis of the state stored in the writing state storage unit.