Flash drive?

I needed to burn a CD.  My first stop was another store where you can buy these things.  Well, they had CD's +R and -R.  What does this mean?  There were no visible associates so off I go to see the Geek Squad.  They amaze me.  The guy who sold me the computer and some other things came to my rescue.  They had the same thing here.  I told him what I was after and what I was going to do with it and he names something else, "A flash drive."  Now how easy is it to use?  He makes it sound so simple.  No, they won't let me take him home to do it.  He did say it was easy to do, so I bought one. 

Upon arriving home, I am really anxious to use it.  I put it in one of the "ports" and it came on the screen that there was a set of instructions, 12 pages of them and you call this simple!  I fiddled around for a while, and another screen came up.  Ah, this looks like what I want.  Yes, it is transferring the pictures to this little one and a half inch thingy.  Hey, I learned something new and did it myself.  Never did read the directions....