Ubiquiti Network Video Recorder
A video recorder with (4) 2.5/3.5" HDD bays that can support up to 30 days of storage for (15) 4K cameras or (50) Full HD cameras.
Ubiquiti Network Video Recorder Pro
A 2U-sized video recorder with (7) 2.5/3.5" HDD bays that can provide up to 60 days of storage for (20) 4K cameras or (60) Full HD cameras.