title: Write File to disk chunk by chunk using web browser and client side javascript
body: <p>Is it possible with newest Chrome, Firefox or IE to ask the user for a Save As location for a file and then write the file chunk by chunk with your own javascript algorithm "appending" bytes to the desired/choosen by user location. Let me clarify:</p>
  
  <ol>
  <li>Ask the user to point a Save As location for a filename ex: C:\ggg.png (but the data not saved yet)</li>
  <li>After that be able to write data to it programatically chunk by chunk in some Blob or something?</li>
  </ol>