The WD181EJRP is an 18TB HDD from Western Digital, crafted for surveillance and security-focused storage solutions. Part of the Purple Pro series, this 3.5" SATA drive offers a blend of high capacity, performance, and durability. With a 6Gb/s interface and a 512MB cache, it is engineered to handle the continuous write-intensive demands of up to 64 HD cameras. The Purple Pro technology integrates AllFrame AI technology, enhancing the drive's ability to record and play back video footage without missing a frame. Ideal for surveillance DVRs and NVRs, it provides reliable, around-the-clock storage for security footage.