The Synology SNV5420 is an enterprise-grade M.2 22110 NVMe SSD, built specifically for use as a cache or storage drive inside compatible Synology NAS units rather than as a general-purpose consumer SSD. Synology's own-branded SNV-series drives are validated and firmware-matched against Synology's DSM operating system and specific NAS models, aimed at improving random I/O performance (via SSD read/write caching) or serving as all-flash storage pools in business NAS deployments. This is the 1.6TB capacity point in the SNV5420 line, in the larger 22110 physical form factor (110mm long, versus the more common 2280) that some rack and higher-bay Synology units require for their M.2 slots. Buyers should confirm their specific Synology NAS model supports the SNV5420 and the 22110 form factor before purchase, since Synology NAS units are often locked to a specific list of validated cache/storage drives.