# XNA 4.0 storage framework not being recognized

This may be a silly question but, im unable to do any save game data because for some reason, this following namespace is unrecognizable:

 using Microsoft.Xna.Framework.Storage;


All the normal XNA namespaces work but not this one. Im ade sure to uninstall XNA 3.1, and the windows phone 7 SDK. Then i un-installed XNA 4.0 and reinstalled it. Im not sure whats wrong, but i would really enjoy some help so could get to saving some games.