There is only one file type that uses the .MTFF extension:
MadgeTech Data Logger Report
Data logger report created by MadgeTech, an application used to download and review data collected by MadgeTech data logger devices; contains datasets, such as temperature, water level, and pressure readings, downloaded from the data logger.
NOTE: You can create tabular data, graphs, and statistics from the data in an MTFF file.
Updated: May 21, 2015