can you please share your backup strategy?
I'm gonna have a total of 40TB available storage after RADIZ2. I'm wondering what's the best backup option. I seen online backup, but does that get expensive for 40TB?
It's nothing really special, but it works well for my use case (in home, used for shared storage of miscellaneous stuff like documents and pictures [we take a lot of pictures], audiobooks, movies, software, etc). The desktop computers also back up to FreeNAS daily. Most of it is archival, other than the media, and most of our day to day documents are on cloud storage, which is also backed up as part of the client backups.
Anyway, I have a 12 TB encrypted external drive, which fits everything at the moment, that lives in my locker at work. I take it home periodically and run a robocopy to it. I have a scheduled task that runs every few days to upload any new items (other than movies, software, and client backups) to Amazon S3. If the server spontaneously combusted, it wouldn't really be a very big deal. Everything really important is in at least two other places (S3, cloud, USB drive) and everything replaceable is in at least one (USB drive).
As for expense, it depends on your use. If you have frequently-changed data or need to access it often, then it's a little more expensive. Most of my stuff doesn't change, so I upload into Glacier storage on Amazon S3 which is dirt cheap. I think there are some services that have essentially unlimited online storage.