Western Digital WD40PURZ Purple 4TB Surveillance Hard Drive SKU# WD40PURZ MFR# WD40PURZ $119.95 Quantity discounts available QuantityPrice 4 TB3.5 InchSATA 6 Gb/s5400 RPM120MB Cache3 Year Limited Warranty Ship Pickup in Store - FREE! Select Store to check availability. Quantity -+ Add to Cart Have questions? 800-531-5369 Ratings & Reviews