Please bear in mind: when planning your backup strategy, ransomware will also try to encrypt files on drives that are mapped, and some modern variants will look for unmapped drives too. Ransomware will look for external USB drives, as well as any network file stores that you have assigned a drive letter to.
Using a comprehensive, automatic backup solution, such as Carbonite Endpoint 360, for all your endpoint devices and the data that resides on them, including data in Microsoft O365 protects against accidental deletions, overwriting, ransomware and other threats.
You need to set up a regular backup regimen that, at a minimum, backs up data to an external drive, or backup service, that is completely disconnected when it is not performing the backup.
The recommended best practice is that your data and systems are backed up in at least three different places.
- Your main storage area (file server)
- Local disk backup
- Mirrors in a cloud business continuity service
The information presented in this article has been taken from the Malware Prevention Guide.