Promise 18 TB Hard DriveIntroducing a high capacity storage solution built for scalability, reliability, and effortless integration with Promise storage systems and other storage arrays. The Promise 18 TB Hard Drive is designed to expand your digital worldwhether youre growing a NAS, expanding a DAS array, or anchoring a data center grade archive. With a staggering 18 terabytes of capacity, you can store millions of images, hundreds of hours of video, or up to a million