Amazon's Cloud Drive isn't bad, and its storage options are inexpensive, but — like so many of these services &mdash it needs real operating system integration to be first-rate.

Apple's iCloud tries to do everything for Apple users, but it doesn't do nearly as well at any single thing as we'd like.

Yes, Box offers cloud storage, but it's really more of a set of cloud-based business-collaboration and workflow tools than a pure cloud storage play. Of course, that may be exactly what you want.

Dropbox was the first popular personal cloud storage service, and thanks to its integration with most popular operating system's file managers, it's still the best.

Google Drive is closing ground on Dropbox — now if it just supported Linux natively. Besides storage, it also incorporates Google Docs.

If you can handle the ads and a few restrictions, it's hard to argue with MediaFire's 50GB of free storage.

Sure Mega comes with 50GB of free storage, but it's also slower than sludge. Of all these services, even with so much free storage, this is the one I like least.

If file privacy is your top concern, then SpiderOak is the service for you.

It doesn't always work well with Windows, but Ubuntu One is a great cloud storage service for Ubuntu Linux users.