QNAP 4 TB Hard Drive - 3.5" Internal - SATA (6Gb/s SAS)Upgrade your NAS with a dependable 4 TB internal hard drive from QNAP. Engineered for reliable performance, this 3. 5" drive is designed to slot into most NAS enclosures and provide continuous, efficient storage for a growing library of media, backups, and critical data. With a generous 4 TB capacity, youll have ample space to store millions of photos, hundreds of hours of high definition video, and extensive archives while maintaining smooth access