I like that we are able to send documents via Dropbox or Google Drive without having an account set up, just by sending it through our app! It's great because you don't have access unless someone gives permission beforehand - no worries of accidentally sharing something confidential out into public view/sharing when using apps such as Slack where many people could be viewing at once!! This is also very helpful during disasters since they can still get their files even if there isn't internet available due too power outage etc., but only accessible until restored again after which time all previous messages would go back online instead so not ideal either way around though this does work well enough depending upon how long one has been offline before getting reconnected afterwards however; perhaps allowing more than 1 week off between 2 disconnections? If my network fails then i'm unable upload new emails onto DropBox / GDrive.