If you have the latest Huddle iOS app installed on your phone, it is possible to save any type of file directly into Huddle using the 'Open in' feature and selecting the blue Huddle icon (grey if US government) 

The 'Open in' feature is triggered within many apps through selecting the Arrow leaving a tray Icon in the top right hand corner.

Upon selecting the Huddle icon you will be presented with your available workspaces to decided where you wish to save the file.

Screenshot below shows the behaviour when opening an image file on an iPad device with Huddle installed.