I started using K9 just recently, and it was all good until I tried to download an attachment; when I tap on download it says that it's "impossible to download to SD" and refuses to do anything. If I go with open, sometimes it opens the file, sometimes it doesn't; is there a rime or reason to this? Am I doing something wrong? On a similar note, is there a way to directly download an attachment from the Gmail app? It only has the preview option, but I don't see a direct download one.