Hi Jean, I may be wrong, but I get the feeling you may not have a computer network set up at the present time.
What I mean is that xp has built-in network capabilities and is ready to connect to network hardware such as a router. If you don't have a router, a wireless card for the MPower won't do you any good in connecting to your home pc. It will work fine if you are somewhere within the range of a wireless network such as airports, starbucks, and other public places. Assuming you don't have a home network, you can still connect to your pc and transfer files to and from the MPower by installing the Activesync program onto your pc. Once you get this set up, the best way to connect is by using a usb cable between your pc and MPower. You can then transfer files to and from the MPower by using the keyboard of your pc. There's quite a bit of information on this in the MPower manual, and there are several steps to setting this all up, but won't go into them now as you did ask a somewhat general question and I don't want to bore you with a bunch of details which you may not be interested in. But, it really is quite easy to set things up to transfer files and do other things whether or not you have a home network. This is one of the really great points in favor of the MPower. Don
