"While [multifactor authentication] is an offensive tactic that safeguards data from hackers with more complex security measures, an efficient backup plan is your first line of defense should they gain access to your data.... The rules of the 3-2-1 backup strategy are straightforward: Consistently maintain 'three' or more distinctive copies of all system data. Retain 'two' copies of your backup data on different devices and separate storage media. Store 'one' backup copy offsite."