File storage device, host apparatus, method for formatting nonvolatile semiconductor memory, and method of writing data in nonvolatile semiconductor memory

摘要

A file storage device includes a nonvolatile semiconductor memory which is accessed by a file system of a host apparatus. The nonvolatile semiconductor memory has a user data area. The user data area is accessible by the file system. Device information indicates that the nonvolatile semiconductor memory is a nonvolatile semiconductor memory and is written in the user data area.