I currently have an Odroid H4C that has two SATA with two 12TB hard drives.

It’s starting to get too small, so I was thinking of taking the step and move to a 4/5 bays NAS and reuse the disks (the other option was to add disks via USB).

What NAS do you recommend me to continue being able to have my *ARR suite + torrent + nextcloud + syncthing + small services(gitea, trillium notes, etc)?

I would like to already have some redundancy, can I use the hard drives as they are or will I have to do something to them besides adding other hard drives? (my idea was to add one more disk of 12 to have redundancy and already expand space with a fourth disk)