Unknown.part06.rar -

A specific piece of a split data set (like a game, software, or media collection) where the contents are hidden until all parts are combined.

This file name suggests you are dealing with a , specifically the sixth volume of a larger set. unknown.part06.rar

A file from a website or peer-to-peer network that hasn't finished downloading or has lost its original name. A specific piece of a split data set

To help you correctly, I need to know which you are referring to, as this generic name is often used for several different things: unknown.part06.rar