How to protect local backup drives

We make sure our customers have cloud backups for disaster recovery. We also set up image backups to local drives.

What are the best ways to protect local backup drives from encryption or wiping by ransomware?

One secure local option is a NAS not joined to the domain. It has a login and password not used anywhere else and known only to the local tech contact, their backup person and us. The login and password are encrypted in the backup …

backup backups cloud customers cybersecurity disaster disaster recovery domain drives encryption joined local login nas password protect ransomware recovery wiping