.FFS File Extension
File TypeFME Desktop Feature Store File
This file is saved in a binary format, which requires a specific program to read its contents.
What is an FFS file?
Data file created by FME Desktop, an application used for manipulating and converting spatial data; contains "features," which are spatial data sets and objects stored in FME Desktop's format-neutral representation.
FFS files are useful for saving data in the native application format so that it can be converted in multiple different ways.