1 single HDD? I’d recommend you RAID up some more… or at least take my recommendation on testing your backups

RAID is not a backup solution, but an availability one. If your system doesn’t need high availability, a single HDD is acceptable if you can live with a few hours/days of downtime.

I am saying that because the prices of any storage is insane nowadays and I want people to see that 1 HDD is good enough to get started, either for homelabbing or for learning a more professional environment.