Backup. It's more often than not the guilty omission in homes and small offices, and the hassle of setup - finding a place to plug in for both power and network - is often cited as a key hurdle. Synology wants to change all that with the DiskStation DS213air, the company's first WiFi-equipped NAS: up to 8TB of storage, all the media streaming a modern home might demand, and in a small and affordable footprint. Does wireless overcome that big barrier to backup? Read on for our full review.