Sign in to your Microsoft account. I am a Google person. I use GMail, Google Calendar, Google +, Google Reader, and a host of other Google connected apps. I store documents, and other stuff on Google Drive, and pay extra to get 50 Gigabytes of storage. Why on earth would I also set up a Microsoft SkyDrive, and store files and documents there? Why not? Redundancy is always good; witness Curiosity, which just had to switch to its redundant computer after Computer A failed. And, SkyDrive is actually quite easy to use, and comes with web enabled versions of Word, Excel, Presentations, and a free 10 Gigabyte storage box. You can never be too thin, too rich, or have too many apps. I will never be thin. I will never be rich. So, at least I can have a bunch of apps.