Archive format is not supported

[Willpiam]

So I've attached a disk drive to my pi to get some data of a DVDR to get a screen to work through the pins. I opened the file and this comes up...

Sorry, this archive format is not supported:
the proper archives is not installed!

So what archives do I need and how do I get it?
Thanks.

[DougieLawson]

What does a
file filenamegoeshere
command tell you?

What do you think might be in the file that you're looking at?

[Willpiam]

What does a
file filenamegoeshere
command tell you?

What do you think might be in the file that you're looking at?

It says...
3.5inchRPiLCD.7z: 7-zip archive data, version 0.3

I think its software to make the LCD display work
Note: file name is. 3.5inchRPiLCD.7z

[DougieLawson]

sudo apt-get install p7zip p7zip-full
cd /tmp
7z x /path/to/file/3.5inchRPiLCD.7z