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
WD 4TB Blue 3.5" Solid State Hybrid Drive WD40E31X B&H Photo
ST4000DX001 4TB MLC/8GB 64GB SATA III 3.5" SSHD Hybrid Hard Drive | eBay