Working with the file system
Flash Player 9 and later, Adobe AIR 1.0 and later
Flash® Player provides basic file reading and
writing capabilities, via the FileReference class. For security
reasons, when running in Flash Player, the user must always grant
permission before you can read or write a file.
Adobe® AIR® provides
more complete access to the file system of the host computer than
is available in Flash Player. Using the AIR file system API, you
can access and manage directories and files, create directories
and files, write data to files, and so on.