TrueNAS CORE (formerly known as FreeNAS) is one of the best NAS software available as of this writing. This article will not discuss the pros and cons of a NAS solution and assumes you have already decided on a non-enterprise NAS solution for your current needs.
As a matter of fact this is probably the reason why you found your way here - to run TrueNAS CORE in a Proxmox Virtual Environment (VE).
Note iXSystems is developing a similar product - TrueNAS SCALE. Ultimately i believe CORE + Proxmox fits my needs better at this time.
Read on to find out why.