FAT [File Allocation Table] is the computer file system architecture. Good performance in lightweight implications. However, it is useless to expect a similar performance in the modern file system
Specifically, fat files are just a theme file. Basically, which is used by zinf.zip format, the settings file and images are in the fat file. So do dot zip files in the fat file. When it is detected, the audio player's appearance changes. Apart from Zinf, since the FreeMad Audio Player is based on it, since then it is called "Zinf Is Not Free"
How to open?
Zinf basically opens the fat file. Go to Options -> Themes -> Add Theme. Select a theme that you want to add a fat file. Then the appaye. Also can also be opened after rename .fat to .zip. However, using this approach will only show XML files and images in it. Moreover, the whole theme can not be applied in this manner. There is another way to open .fat file. Just install a file extractor like 7-Zip and right click on the fat file. Open it with the file decimpressor.
How to convert
Do not get anything if the dot fat file is converted to another format. Because it will have a Zinf Audio Player Theme file with the fat file.