Only seems worthwhile using and relying on online storage, if you use two or three completely separate services, all sync'ed. So if one goes down or disappears without notice, you have backups, and can add another completely independent service.
Though with bandwidth limits and limited online storage capacity (I've over 200GB of business files, plus 450,000 photos, over 1TB), still appears more cost effective and efficient to backup to a portable hard drive every few months anything new and store at a secondary secure location, with online storage only being used for short periods until that backup is made and a local drive copy of that backup used on a daily basis.
Though with bandwidth limits and limited online storage capacity (I've over 200GB of business files, plus 450,000 photos, over 1TB), still appears more cost effective and efficient to backup to a portable hard drive every few months anything new and store at a secondary secure location, with online storage only being used for short periods until that backup is made and a local drive copy of that backup used on a daily basis.