You can use flash drives or storage devices. It can be also done by transferring data over internet.
Yes, you can.
Download means to copy something from somewhere into another place. Typically this is done over the internet from one computer system to another computer system.
as long as the other computer has the correct expansion slot
One of many ways, yes
To avoid Computer Viruses to protect one computer to another computer.
Yes, it takes up the bandwidth.
You take the memory card from your camera and put it into the SD slot on your computer. Then something should pop up and you load them on there. Or you can take your USB cord and plug it into one of the USB ports on your computer and then plug it into your camera and something should pop up.
U plug it into one computer or whatever you want to get information out of, then you can view the files and put files or documents onto it and then you can take it out and put it into another computer and put anything from the flash drive onto it. So basically you take info from one machine and put it into another.
They vary from one computer to another.
One is PC for Personal Computer.
how do i share my game from one to another computer
Have you checked the version? (bottom left of minecraft application) It might not work because something may be required on the other computer. Or your computer is probably outdated.