I use to have an HP Microserver NAS too; the one with the five trays that pull out? I replaced it with this custom built one:

https://battlepenguin.com/tech/video/build-a-small-form-factor-storage-server-nas/

..but I still have the HP in the closet (it's very slow; no hardware encryption support). I had been running FreeBSD on the new one, and it did save me from some data corruption due to bad ram a few years back:

https://battlepenguin.com/tech/zfs-woes-or-how-zfs-saved-me-from-data-corruption/

Two years ago I switched to this rackmount system and put Alpine on it. It still uses ZFS with native encryption for storage, but the main drive is plain old ext4.

https://djsumdog.com/@djsumdog/posts/Am3Cu7siwopUp5efVg