"1 File" type, Attempting to read/write

Hey yall,

I have a file which is a software update for a piece of technology that is identified as being a "1 File" type. Im having some problems with it so im attempting to open it just to look around and see what it looks like inside. When I open in notepad or notepad++ its just garbled symbols. Does anyone have any insight on how I might be able to open it? Thanks!