The Synology 4TB Plus internal NAS HDD (model HAT3300-4T) delivers 4TB of storage with a 3.5-inch form factor and connects via SATA III 6 Gb/s. Featuring a 256MB cache and 5400 RPM spindle speed, it supports sustained data transfers up to 202 MB/s. Designed for NAS environments, it offers a workload rating of 180TB per year and an MTBF of 1 million hours, tested extensively for reliability. Firmware updates are managed seamlessly through Synologys DiskStation Manager. Its efficient power consumption ensures quieter operation, all backed by a 3-year limited warranty.