wireless - How do I install Jensen Scandinavia Airlink 100ac driver?

I just recently installed Ubuntu 14.04.
I am trying to follow the simple step by step guide in the accompanied pdf file to install the Linux driver for the airlink 100ac. The only internet access I have is on another laptop, and I have an 8gig usb stick which I can use. To transfer files, as I can do with the driver folder.
The step by step guide:

Installation of driver in Linux

1. Download the latest Linux driver from
   http://www.jensenscandinavia.com/downloads




2. Copy the driver to your local folder.



3. Open console


4. Unzip the driver



5. Enter make
   (and click enter)




6. Enter sudo apt-get install build-essential
   (and click enter)



7. If you have the
   Air:Link 500ac - enter
   (and click Enter)
   sudo modprobe 8812au. If you have the
   Air:Link 100ac - enter
   sudo modprobe 8821au
   (and click Enter)

The driver should now be installed and your
AL100AC / 500AC is ready for use.

How do I install this? On step 5, when I type make and press enter, it says :

make: *** No targets specified and no makefile found. Stop.

And on step 6, I suppose I need internet connection? I don't have an internet connection before I get the usb dongle to function. Can I get build-essential via usb?