Methods to save a file in HD with JavaScript

Question

How can I do that?
May I have permissions to create a paste, to put a file there and overwrite it if necessary?

Answer 1

For HD you could use a vector image(an image that doesnt get fuzzy as you soom in)

Answer 2

That would be possible using a js runtime like node.
For security reasons that feature is not part of js by default.
You could store data in the browser with 'localStorage' or 'sessionStorage'

Answer 3

HD = Hard Disk***(sorry for not let this clear)

Answer 4

I would like to save in my cell phone for personal propouse...Only to me