Read disturb in a flash memory destroys data that is not requested to be read, and an efficient read disturb check method is therefore needed. In addition, data may be destroyed beyond repair by error correction before a read disturb check is run. Thus, this invention provides a non-volatile data storage apparatus including a plurality of memory cells and a memory controller, in which the memory controller is configured to: count how many times data read processing has been executed in memory cells within the management area; read, when the data read processing count that is counted for a first management area exceeds a first threshold, data and an error correction code that are stored in the memory cells within the first management area; decode the read error correction code; and write the data corrected by decoding the error correction code in other management areas than the first management area.