I have my applications and files synchronize to a SaaS cloud file storage. I'd like maintain a physical copy in case of termination by the cloud provider.<p>What's the most cheap/effective way to manage physical/local backups that are synchronized with cloud storage provider. I'd prefer not to use another service like BackBlaze.
You can build your own NAS, but for a much simpler way to start, buy couple of external drives and use Stable bit Drive pool application, along with <a href="https://github.com/rclone/rclone">https://github.com/rclone/rclone</a>
If your cloud storage is supported by rclone, you can use that to mount the storage and then back it up, locally or to an S3 storage at a different provider. That’s how I backup my wife’s and daughter’s OneDrive, using rclone and restic.
Synchronization is not backup, learn the difference. For backup I'd choose a cold storage based on spinning disks, these things hold for 20 years unpowered with no problem. No SSDs - these fail after few years in cold storage.