Synology DS916+ 4-Bay NAS Preconfigured with 4x4TB (16TB) Seagate IronWolf NAS HDD Installed, 8G RAM, Hybrid Raid Built, EV-DS916+8G16N, w/ All-Systems-Go by evodo 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 4x4TB NAS hard drives installed and configured in Synology Hybrid Raid(Data Redundancy) usable 10.5 TB (14 TB RAW) provides no-worry data redundancy Quad Core N3710 and 8GB RAM provides an efficent and robust NAS solution with read speeds up to 225 MB/s and writes up to 221 MB/s Users may purchase the DX513 for up to 72TB of raw storage 3 Year Warranty & Tech Support