With 25 GB of free online storage, Microsoft Windows Live SkyDrive lets users upload files, photos and other content to the cloud to be accessed from anywhere. SkyDrive also hypes its ability to share and collaborate on content in the cloud. In-e-mail and social network sharing are two key components for SkyDrive, through which users can upload and share documents and photos with people or groups via e-mail or links. SkyDrive also works with Office Web Apps to let users create, edit, view and share Word, Excel, PowerPoint and OneNote files online. And SkyDrive boasts powerful permission settings to ensure content can only be viewed by who users want viewing it.