How do you use MEMORY CARDs?

I got one of these for my B-Day and none of the games that I have tried give me the option to save my games on them.

I even "personalized" it via the Xbox Dashboard (gave it a name).

Any help would be greatly appreciated.

Not every game has that option, but most do. If you want to copy the games or files onto it, use the Xbox Dashboard (start the XBox without a game in it). Then, go into the Memory section. When in there, select which game you want, then go right, so you can select an individual file from the game to save. Once it's on there, then it will work better during the game. Most of the games though, when it asks for Load/Save, you'll have to move right to get it off of the Xbox harddrive from being selected.