Quazatron

Don’t.

Everybody hates preachers.

Lead by example.

Journey.

Raid can protect you from a single drive failure in case you need an “always on” setup. Even then, if the drives are identical, they can fail within days from each other. If you don’t have monitoring, you’ll lose everything before you can react. I feel that’s not your use case.

You need backup. You can use something like rsync or even better borg backup. Keep the backup offline and backup often. You’ll be safer that way.