Location of the documents attached by used in news tab as comments

I haven't tried this before myself, but by any chance can you try attaching something to a news post and then search for it within the /documents tab and/or the /design interface? Assuming it's even findable by that route, that could potentially reveal the location in the file system for such uploads.

Edit: I just gave this a try and it doesn't appear to show up in the Appian FS in any way I can find / in any of the normal folder structure.  My guess is that they are stored in an area of the filesystem that's not otherwise accessible other than by the newsfeed.