The only way to be safe for ransomware, except for keeping a offline backup, is to have a immutable online backup.
restic is a deduplication backup sofware, designed for ease of use and security. Rclone is a versatile program for syncing data between a huge variety of protocols and cloud providers. What is especially nifty is that restic can use rclone as a backend, and by that extend restic destination into most cloud providers.
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