This Western Digital WD42PURZ 4TB internal hard drive is a top-of-the-line storage solution for your PC or Memory Vault. With a rotation speed of 5400 RPM and a cache of 256 MB, this hard drive provides reliable and efficient storage for all your important files and data. The drive is compatible with HDDs and has a form factor of 3.5 inches. In addition to its impressive storage capacity, this hard drive comes with a range of features that make it stand out from other models on the market. For example, it has an in-built media server and supports up to 64 HD cameras, making it perfect for surveillance monitoring. The drive also boasts AllFrame AI technology, which ensures that footage is recorded and stored with the highest quality. With a manufacturer warranty of 3 years, this hard drive provides peace of mind and long-term reliability. ALL SALES FINAL UNLESS DAMAGE DURING SHIPPING