Hi there
I wanted to briefly share my experiences with Rockstor as Time Capsule. Since one year 4 Imacs are being backed up to AFP Share hourly.
For a very long time I was looking for a NAS that would make this really reliable. I tried many system out, but at some point all systems showed bugs. Not so with Rockstor. An yeah, just didn’t want to buy an expensive Time Capsule from apple 
So to all who want a time capsule that just runs and runs and runs … do it by yourself with Rockstor.
My Rockstor ran in a VM on Unraid. Unraid is an ingenious server software. But Apple and unraid don’t like each other either…
Since a week I run the Rockstor server separately on an I7 notebook with a USB harddisk attached. It works like a charm. The UnRaid server comes into an environment where there is a public IP address - out of my house. Then NextCloud is installed in a VM. Later on I say byebye to google and co… i hope so
By greg