I use dropbox but I also have a complete offsite backup service (Crashplan). The thing with Dropbox, especially when you're sharing drives, people will delete shit. Also, I was trying to free up space in my phone and cleared some Documents and Files settings and it randomly deleted a bunch of random shit all over my dropbox in multiple file locations. It was a bitch to get it all back. I tried to do a simple restore to undo everything that was deleted that day but each deletion was a separate event (thousands of files) and tech support was non-existant. I backuped whole folders from crashplan which worked a lot better.