Comment 3 for bug 1438903

I found out about a workaround in launchpad/Dekko (mail client).
It's an ugly hack but you can open the file with any supported application and then get it back in /home/phablet/.cache/<appname>/HubIncoming/, using the current time as an indication of where it is (what subdirectory).
Works for me for .pdf and docviewer, and might do so with other content types (and other apps).
Still it would be better if File Manager could declare itself as a destination in content-hub
for all files.