If you don ' t mind commercial software and want something stupid easy , I switched to CrashPlan years ago . PCtoPC and local disk backups are free . You want to back up to a different machine you don ' t need your power supply to die and take both your array and backup disks with it . Paying $ 6 mo . gets you unlimited cloud backup with a locally generated key if you desire and more control over backup retention and scheduling , and some other features I don ' t remember . If you have a slow connection , you can schedule the offsite to only run during offpeak hours . I have several family members backing up to each other on the free plan along with me , and a PCtoPC backup in house . I ' m the only one on a paid plan because I have too much data to fit on any family members ' machines , so I need to use their cloud .