Where Is The File Sandbox For A Chrome App?

I'm developing a chrome app with the capability to handle files. I need to copy these files to the app, which I believe stores it in the app's sandbox. But where are these files,

Solution 1:

They go into a "sandbox" which isn't easy to inspect. You might want to instead use the new chrome.fileSystem chooseEntry function (http://developer.chrome.com/apps/fileSystem.html) with the "directory" option and also "retainEntry" to get access to write to a normal directory on your computer, so that you can see the files and have them not be cleared out when you clear your browser cache, etc.

Solution 2:

So I'm not entirely sure at the lower level how Chrome Apps differ from a normal web-page, in the contect of the HTML5 Filesystem API.

But I can say that persistent storage On Windows 7, with Chrome is here:

C:\Users\{user}\AppData\Local\Google\Chrome\User Data\Default\File System\

If you want to find out where it is stored via Chrome on other OS please see this_post

Note, the directory names are weird, that said though the underlying file contents and sizes are exactly the same, so if you poke around the files and open in a text editor you'll be able to see the original contents of your files before you copied them into the persistent web-app space.