If I use JavaScript to create a file on a HTML5 Filesystem, can I find it on the real file system of my computer?
originally I think all file is stored on a virtual file system , so files can be protected. but it's not. for chrome, file is placed at "C:\Users\user name\AppData\Local\Google\Chrome\User Data\Default\File System" with obfuscated name on windows 7. so you can operate on it as local file.
来源：https://stackoverflow.com/questions/11719816/where-is-the-filesystem-in-html5-stored-on-the-real-file-system