WD Purple 4TB Surveillance Internal Hard Drive Disk 3.5" 64M Cache SATA III 6Gb/s 1TB 2TB 3TB HDD HD Harddisk for CCTV DVR NVR

The conclusion is based on: 1) To derive an overall view of product recommendations, we applied various statistical analysis and artificial intelligence techniques. 2) Reviews and ratings were analyzed, and we consider a rating of 4 and above to be an indication of a great product. 3) A meaningful result requires at least 100 orders, so the more orders we analyze, the more we trust the product rating conclusion more.

A product's price history graph - This can help you spot real discounts from fake ones. We keep a record of the price and then monitor changes on a daily basis, making it possible to take advantage of sales and limited-time offers.

We check the overall store feedback score, the higher the score, the better the chances of getting a good service. Over 91% feedback is considered positive feedback.