WD Gold 4TB is the industry’s gold standard for surveillance and server storage because it’s purpose-built to handle the brutal, "always-on" workload that would kill a standard desktop drive. Instead of just storing files, it uses specialized AllFrameTM technology to virtually eliminate the frame loss and pixelation that usually occurs when multiple high-def cameras are recording at once. It’s engineered to manage up to 64 HD streams simultaneously while running cool and quiet, ensuring your NVR or DVR stays reliable for years without overheating.