Synology DS216J 2-Bay NAS, 2x4TB (8TB) Seagate IronWolf NAS HDD Installed, RAID 1 Mirror Built, EV-DS216J8N, Model EOL replaced by EV-DS218J8N evodo's All-Systems-Go ensures a ready to use and tested device right out of the box. No waiting for RAID arrays to be built. Seagate IronWolf 2x4TB NAS Hard Drives Installed and Configured in Synology Hybrid Raid(Data Redundancy) Usable 3.5 TB ( 7 TB RAW) No worry data redundancy protects you and your data from data loss should a hard drive fail. Includes all the Synology DS216J features such as DLNA media streaming and cloud syncing Google Drive, AWS, Dropbox and more. 2 Year Warranty