It's good to have proper backup. You never know what might happen. Some has suggested a backup solution provided by MP. I have asked for a way to zip them periodically (in between MP restart) so that I can back them up to the cloud fairly easily.
MP then say, the only important folder that needs to be backed up is the backup folder (and one other folder i forgot).
My workaround is just to backup the whole folder so i used http://mega.nz instead. 50GB of free storage.
Other notable ones:
Maybe you guys can chime in what method and solution you use.