*** This item comes with 5 x 3TB NAS grade storage drives. Synology Disk Station DS1515 is the first 5-bay Value series model with a quad core CPU, hardware encryption engine, four built-in Gigabit LAN ports and the scalability of up to 15 drives, providing the most cost-effective storage solution for growing businesses to efficiently manage, protect, and share data. Synology DS1515 is backed with Synology"s 3-year limited warranty.