FFO (Find Fast Document Properties Cache)
The FFO System file format
FFO files are most commonly associated with Microsoft Find Fast, an indexing program that facilitates the search function on Windows computers. After each Find Fast search, a FFO file is created, providing information about the documents found according to a certain search term.
Technical details of FFO files
The Find Fast properties cache files contain information about the documents found when a user uses Find Fast to search on Windows. These information include, for example, the author of the document or the title. The files are typically saved in the root directory of the hard disk where that was indexed.