| 摘要 |
Provided is a storage media, including a nonvolatile semiconductor storage device, from which data is erasable with certainty on a file-by-file basis so that files leaks are prevented to a maximum possible degree. In a file storing method for storing a file in the storage media including a nonvolatile semiconductor storage device having a plurality of erase blocks each including a plurality of memory cells from which data is erasable as a whole, (a) one file is stored to one erase block, or (b) an overwrite operation of writing prescribed data or random data to a bit of a memory cell, at which a file to be erased is stored, is performed. |
