Norton Zone is a file sharing service which allows you to upload important files to the cloud (you get 5GB for free).
The program works in a similar way to many similar services. It installs almost anywhere (there are clients for Windows, OS X, iOS, Android and Windows RT). It adds a Zone folder to your system, and anything you drop there is automatically uploaded to the cloud, as well as synchronised across all your devices.
Norton Zone makes it easy to share data with others, too. At its simplest, the service can create a link which allows someone to view a specific file. But you can also use Zone for collaborations, setting up a folder and allowing a group of people to access, download and delete whatever it contains.
There are useful options here and there to help deliver more precise control over what you're doing. And so it's possible to create links to a file which expire at a given date, say, or only work for a certain number of downloads.
And Norton's extra touch here is that all your files are scanned for malware before they're downloaded, so everyone can be confident that they're safe.
5GB isn't the most generous of server space allocations, but Norton Zone is easy to use, with plenty of features, and works just about everywhere. Give it a try.