FreeNAS is a tiny FreeBSD-based operating system which provides free Network-Attached Storage (NAS) services (CIFS, FTP and NFS).
PRE-RELEASE VERSION (TESTERS ONLY)
Release notes:
https://www.ixsystems.com/blog/library/freenas-11-3-beta1/
https://www.freenas.org/
https://distrowatch.com/table.php?distribution=freenas