Amazon.com: Evertech 16 Channel Digital Video Recorder 4TB HDD h264 h265 Hybrid 4in1 AHD/ TVI/ CVI and Analog Compatible Remote Smartphone Access Security Video Recorder
Dell 4TB 7200 RPM SATA Enterprise 6Gbps 3.5in Hard Drive | Dell USA
Speco H12WHRN4T 12 Channel Hybrid Wall Mount Digital Video Recorder, 8 HD-TVI Channels plus 4 IP Channels, 4TB HDD
SSD vs. HDD vs. hybrid: Which storage tech is right for you? | PCWorld