Saving a movie to the Computer

[rmt@36]

I was just wondering is there a smart way to save a movie from a disk to the computer.

Right now I tried saving a moving and I finally did it but it is 3.8GB, and in four parts. What do I need to meld them into one and then to compress the movie to between 700-800Mb easy enough for uploading.

I have a lot of stuff on my computer, but I am a neo-phyte when it comes to movie making and the like.

My most advanced software (I think) is Nero7 Ultra Edition


Any help is greatly appreciated

Thanks in advance for any help