FreeNAS 9.1.0 is an update to the open source Network Attached Storage system. Key updates include support for the latest ZFS features like LZ4 compression, an improved volume manager, and easier installation of plugins and software using a new AppCafe browser. The update also features alerts that can be dismissed, enhanced shell functionality, and other administrative improvements. FreeNAS is based on FreeBSD and provides enterprise-grade file sharing and storage capabilities for home or business use.