I’ve been looking at NAS implementations for a long time. I looked at FreeNAS for a while then OpenMediaVault. But what I really wanted was to be able to take advantage of btrfs and its great RAID abilities - especially its ability to dynamically expand. So I was happy when I discovered Rockstor on Reddit. Here are some videos in which I explore the interface and how to work with Rockstor using a VM before setting it up on bare metal.