Do you even use cloud services or do you prefer to have everything locally? If you aren't stuck in the stone age, then what cloud service(s) do you use and why?
Personally I use Google Drive and Dropbox mainly, for two different types of uses. Google Drive is so tightly integrated with Google Office which is something I used for everything from school work to writing out random theories on my favorite series. Dropbox is what I mainly use when I upload and share files with others as well as backing up files that I want to keep in-case my local storage goes to hell. Dropbox is also useful as there are a lot of services that connected with it so you can upload directly from it, or back-up directly to it. (MyAnimeList/HummingBird for example.)