ReFS
Resilient File System (ReFS), codenamed "Protogon", is a Microsoft proprietary file system introduced with Windows Server 2012 with the intent of becoming the "next generation" file system after NTFS. ReFS was designed to overcome problems that had become significant over the years since NTFS was conceived, relating to changes in data storage requirements. These requirements arose from two major changes in storage systems and usage (the size of storage in use large or massive arrays of multi-terabyte drives now common), and the need for continual reliability.