One of the leading lights in the NAS device world, Synology, now have their own NVMe M.2 SSD range – the 400GB SNV3000 series. Designed to be used as a cache drive in their NAS devices, the M.2 22110 SNV3500 SNV3400-400G comes with power loss protection, while the SNV3400-400G built on the more familiar M.2 2280 format, does not have such protection.