TerraMaster, a professional brand that specializes in providing innovative storage products for home, businesses and enterprises, presents the HyperLock-WORM File System, a unique security feature of TOS 5 that provides the utmost data protection for very important data files to prevent tampering. With TerraMaster HyperLock-WORM File System, data stored within the special file system can be locked within a specific period. Within this period, the data cannot be altered or deleted but can only be read. This unique file system is ideal for storage important data files such as medical cases, court case files, financial securities, company financial data, and other data files that must not be tampered with. WORM feature is based on a file system that not limited by the file service type. Thus, it is suitable for most common file services. Aside from tampering and deletion, the TerraMaster HyperLock-WORM File System also protects data from malicious attacks including ransomwares, viruses, and malwares.