Hard Drive Slots 4
QNAP High-performance Quad-core NAS for Reliable Home and Personal Cloud Storage - Annapurna Labs Alpine AL-214 Quad-core 1.70 GHz - 4 x HDD Supported
Amazon
QNAP TS-431K 4 Bay Home NAS with Two 1GbE Ports
TeciSoft
Qnap Ts-431K-Us Annapurna Labs Al-214 4-Core 1.7Ghz 4-Bay Desktop Nas For Home & Soho