There are a whole bunch of questions that you did not address. I suspect the analyzer is a remote instrument. How are you connecting to it? Are you having problems communicating to the instrument? Do you need help with making the FP command? Can you see the image already in LV?
For what it is worth, you can buy a decent sized storage hard drive for a couple of hundred dollars. I suspect that you will easily save money by making the purchase and not inventing code for saving hard disk space.
