Synology Inc. HAT3300-4T 4TB 3.5" SATA internal hard drive

Synology HAT3300 Plus Series 4 TB NAS Drive

The Synology HAT3300-4T is a 3.5-inch SATA hard drive built for home and small-office NAS enclosures. It uses conventional magnetic recording (CMR) technology to deliver consistent write performance across its 4 TB capacity. The drive is engineered for 24/7 operation and validated through over 500,000 hours of compatibility and stress testing. Firmware updates are applied directly through Synology DSM without removing the disk.

SATA 6.0 Gb/s Interface and 5400 RPM Spindle

The single specification that determines fit is the SATA 6.0 Gb/s interface paired with a 5400 RPM spindle speed. This combination matches the drive bays and backplanes found in compatible Synology NAS units. The 256 MB cache buffers multi-user I/O streams while the 147 mm length and 20.20 mm height conform to standard 3.5-inch mounting dimensions.

180 TB/Year Workload Rating

Under sustained load the drive is rated for 180 TB of data written, read or verified per year. A 1.2 million hour MTBF figure reflects the statistical reliability target for always-on environments. Stringent validation and over 300,000 hours of additional testing ensure smooth operation during continuous multi-user workloads rather than short bursts.