TYPES OF DATA:
  file, directory, link.

STATUS OF A FILE/DIRECTORY/LINK:

  size      The size used by the file.
  rsize     The real size, in clusters, of the file.
  blocks    The number of blocks (clusters) in use.
  AcTime    When the file was last accessed.
  MdTime    When the file was last modified.
  CrTime    When the file was created.
  mode:     rwx  (will use x? if I can't run a file!)
  uid/gid   Will have user access level? since we can
            read the main file disk... Or use just to tell
            who created it.

CRYPTOGRAPHY

  A file can be encrypted with symmetric and asymmetric
  keys. What algorithm to use? Alrady exist a Perl module
  for it?