When you’re building a Network-Attached Storage, choosing the right operating system is just as essential as picking out the correct hardware. Unraid and TrueNAS Scale are usually the distributions that most users flock to, and there are compelling reasons to go with either option. Unraid lies on the beginner-friendly spectrum, with enough applications and file systems to keep most NAS lovers satisfied, while TrueNAS Scale is a free OS that crams top-notch ZFS support with powerful RAID provisions and terrific virtualization performance.