There are several cloud services that have been developed and are currently used by the audience. While the functionalities of various providers are more or less comparable, I think the quality and user interface would differ.
Although you should know what's best for you, there are several fundamentals you might consider before making a choice.
Thus, if you are very familiar with Google, and Gmail, and you are aware of all its features and workings, you can use Google Drive, the company's cloud storage service. The best choice for G users is this one. It has plenty of free storage and is perfectly integrated.
Cloud services like Microsoft OneDrive, iCloud, MediaFire, and DropBox are similar.