Installing Home Assistant on Proxmox is relatively straightforward thanks to a script by Whiskerz007 on GitHub. I will not detail the steps here as they are pretty well documented both in the README and on the Home Assitant message boards. This topic is about migrating the data from an existing Home Assistant installation into HassOS. The complication is that HassOS mostly has a read-only file system and for whatever reason SCP is not working correctly.