Synology DS1517 DiskStation 5 Bay Network Attached Storage. Comes with just the NAS and power cable (no included drives).
Quad-core 1.7GHz processor, 2GB of RAM, holds 5 x 3.5 hard drives (with 20TB drives, that's up to 100TB). Can be used with one or two additional DX517 to add up to 5 or 10 more drives, for a maximum of 15 x hard drives = 300TB. Ports on back: 4x Gigabit (RJ-45) + 2x USB 3.0 + 2x eSATA.