As a best practice, it’s great great to have your data in more than one location. I use my Synology Diskation as a local network file server at my home. The reality is something can happen and I lose all my important data in that little box. From a BBQ, a birthday party, or maybe the house just burns down and now all my data is gone. Unfortunately my network rack at home will never be as secure as a network rack in a data center. So, backup your data because that’s much easier to do rather than trying to restore from no backup. Makes logical sense right? Derp.