打包应用程序：syncFileSystem / fileSystem API - 用于* large *文件

I am looking to develop a Chrome Packaged App that will (at a very simple level) provide a dynamic form filling UI - but allow users to attach large attachments to the forms (could be upwards of 10 files of 10MB each). I would like to have the ability to save and share the form data and the attachment via Google Drive. The forms will be completed collaboratively by multiple team members who also need to all see the attachments. Imagine a form front-end/metadata that sits on top of a shared Google Drive folder...I am looking to develop a Chrome Packaged App t