The best way to securely back up important data is to take the following steps:

1. 
   

   Create multiple copies of important data and store them in multiple locations.

2. 
   

   Ensure that backups are stored offsite and accessible in an emergency.

3. 
   

   Ensure that any online backups are encrypted and password protected.

4. 
   

   Back up data regularly to ensure that any recently created or modified files are secured.

5. 
   

   Manually verify the accuracy and completeness of backups on occasion.