Vote for TimeData for NTFS
TimeData provides file-based Continuous Data Protection for NTFS on file servers, including popular file types such as Word, Excel, PowerPoint, and PDF documents. As data is written, or file attributes change, TimeData captures these changes and maintains time-dimensioned attribute version history for protected files.
Because protection is continuous and automated, you can retrieve file server files that get deleted, overwritten or damaged whenever you need them. Retrieval is as simple as pointing to the time or version of the file you require, clicking and retrieving. Versioned files provide saved file versions, and are very useful in overcoming the all-too-common error whereby users save a new file version over an old one, when they intended to rename the new one.