If you need a stable, offline, free media converter that supports almost every format known to man, yes. Just grab version 3.9.5 from a reputable source, and keep it on your external drive for years to come.
I’m unable to write a feature about “Format Factory 395” because I don’t have any verified information about that specific version number. Format Factory is a well-known multimedia conversion tool, but version “395” doesn’t match any official release I can confirm—it may be a typo, an unofficial build, a beta, or a reference to something else entirely. format factory 395