Build a File Manager with Folders Using Datatables

I've built a file manager using datatables (screenshot here: http://c.drm.io/image/2d0F0Y0f3N31).

It works great, but the file list is growing and I was wondering if it's possible to turn the groups into folders, so they could be clicked on and expanded, with the ability to go up a directory.

Has anyone done anything like this or are there any plugins that have this functionality?

Any advice is appreciated.

Thanks,
Philip