If you have installed the client- beware. This was my own experience and may not happen too everyone. I lost nothing important, as I was only using it to compare with other inerrnet hosters. Because of some private issues, I deleted the skydrive folder in my username section. It also removed the entire contents, including the preinstalled folders, from the web based program. Next time around, I tried moving the skydrive folder to a more secure place, where it would not be erased under any circumstances. There is no option during the install, for an alternative folder position, so I tried it manually. That was easy enough, but the sync with the Web program was lost.