My wife and I are nomadic workers with our business data stored in Dropbox which protects us from data loss through device issues such as laptop failures. However I want to have a secondary backup of the dropbox data should that data become corrupted or lost. Being nomadic we don't have network hardware to store our backup so I want to be able to back up to a second cloud storage, not as a second sync (such as having the dropbox within OneDrive) but as a real incremental backup to the cloud.
What options do we have to do this?
Software/Hardware used: We run both MAC and Windows laptops